20642598 has 48 divisors (see below), whose sum is σ = 46506096. Its totient is φ = 6612480.

The previous prime is 20642597. The next prime is 20642603. The reversal of 20642598 is 89524602.

It is a happy number.

20642598 is a `hidden beast` number, since 2 + 0 + 64 + 2 + 598 = 666.

It is a super-2 number, since 2×20642598² = 852233704379208, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20642591) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61086 + ... + 61422.

It is an arithmetic number, because the mean of its divisors is an integer number (968877).

Almost surely, 2^20642598 is an apocalyptic number.

20642598 is an abundant number, since it is smaller than the sum of its proper divisors (25863498).

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

20642598 is a wasteful number, since it uses less digits than its factorization.

20642598 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469 (or 466 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 20642598 is about 4543.4125940751. The cubic root of 20642598 is about 274.3183027221.

The spelling of 20642598 in words is "twenty million, six hundred forty-two thousand, five hundred ninety-eight".