20675460 has 72 divisors (see below), whose sum is σ = 62717760. Its totient is φ = 5086848.

The previous prime is 20675443. The next prime is 20675471. The reversal of 20675460 is 6457602.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9121 + ... + 11159.

It is an arithmetic number, because the mean of its divisors is an integer number (871080).

Almost surely, 2^20675460 is an apocalyptic number.

20675460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20675460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31358880).

20675460 is an abundant number, since it is smaller than the sum of its proper divisors (42042300).

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

20675460 is a wasteful number, since it uses less digits than its factorization.

20675460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2077 (or 2062 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 20675460 is about 4547.0276005320. The cubic root of 20675460 is about 274.4637926238.

The spelling of 20675460 in words is "twenty million, six hundred seventy-five thousand, four hundred sixty".