20572002 has 64 divisors (see below), whose sum is σ = 50803200. Its totient is φ = 6117840.

The previous prime is 20571997. The next prime is 20572007. The reversal of 20572002 is 20027502.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20571997) and next prime (20572007).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20572007) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34753 + ... + 35339.

It is an arithmetic number, because the mean of its divisors is an integer number (793800).

Almost surely, 2^20572002 is an apocalyptic number.

20572002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 20572002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25401600).

20572002 is an abundant number, since it is smaller than the sum of its proper divisors (30231198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20572002 is a wasteful number, since it uses less digits than its factorization.

20572002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668 (or 662 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 18.

The square root of 20572002 is about 4535.6368902283. The cubic root of 20572002 is about 274.0052301557.

Adding to 20572002 its reverse (20027502), we get a palindrome (40599504).

It can be divided in two parts, 2057 and 2002, that multiplied together give a palindrome (4118114).

The spelling of 20572002 in words is "twenty million, five hundred seventy-two thousand, two".