20662998 has 16 divisors (see below), whose sum is σ = 41378736. Its totient is φ = 6878880.

The previous prime is 20662979. The next prime is 20663009. The reversal of 20662998 is 89926602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4440 + ... + 7812.

It is an arithmetic number, because the mean of its divisors is an integer number (2586171).

Almost surely, 2^20662998 is an apocalyptic number.

20662998 is an abundant number, since it is smaller than the sum of its proper divisors (20715738).

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

20662998 is a wasteful number, since it uses less digits than its factorization.

20662998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4399.

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 20662998 is about 4545.6570482165. The cubic root of 20662998 is about 274.4086377814.

The spelling of 20662998 in words is "twenty million, six hundred sixty-two thousand, nine hundred ninety-eight".