20258011508 has 48 divisors (see below), whose sum is σ = 42682684800. Its totient is φ = 8218454400.

The previous prime is 20258011457. The next prime is 20258011513. The reversal of 20258011508 is 80511085202.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 677498 + ... + 706766.

It is an arithmetic number, because the mean of its divisors is an integer number (889222600).

Almost surely, 2^20258011508 is an apocalyptic number.

20258011508 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20258011508 is an abundant number, since it is smaller than the sum of its proper divisors (22424673292).

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

20258011508 is a wasteful number, since it uses less digits than its factorization.

20258011508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30600 (or 30598 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 32.

The spelling of 20258011508 in words is "twenty billion, two hundred fifty-eight million, eleven thousand, five hundred eight".