20022140 has 12 divisors (see below), whose sum is σ = 42046536. Its totient is φ = 8008848.

The previous prime is 20022137. The next prime is 20022179. The reversal of 20022140 is 4122002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 500534 + ... + 500573.

It is an arithmetic number, because the mean of its divisors is an integer number (3503878).

Almost surely, 2^20022140 is an apocalyptic number.

20022140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20022140 is an abundant number, since it is smaller than the sum of its proper divisors (22024396).

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

20022140 is a wasteful number, since it uses less digits than its factorization.

20022140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001116 (or 1001114 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 20022140 is about 4474.6105975828. The cubic root of 20022140 is about 271.5418867325.

Adding to 20022140 its reverse (4122002), we get a palindrome (24144142).

The spelling of 20022140 in words is "twenty million, twenty-two thousand, one hundred forty".