19958988 has 24 divisors (see below), whose sum is σ = 53224192. Its totient is φ = 5702544.

The previous prime is 19958977. The next prime is 19958999. The reversal of 19958988 is 88985991.

It is an interprime number because it is at equal distance from previous prime (19958977) and next prime (19958999).

It is a super-2 number, since 2×19958988² = 796722403968288, which contains 22 as substring.

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, 118720 + ... + 118887.

Almost surely, 2^19958988 is an apocalyptic number.

It is an amenable number.

19958988 is an abundant number, since it is smaller than the sum of its proper divisors (33265204).

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

19958988 is a wasteful number, since it uses less digits than its factorization.

19958988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237621 (or 237619 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 57.

The square root of 19958988 is about 4467.5483209474. The cubic root of 19958988 is about 271.2560952002.

The spelling of 19958988 in words is "nineteen million, nine hundred fifty-eight thousand, nine hundred eighty-eight".