21350959512 has 16 divisors (see below), whose sum is σ = 53377398840. Its totient is φ = 7116986496.

The previous prime is 21350959489. The next prime is 21350959559. The reversal of 21350959512 is 21595905312.

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, 444811633 + ... + 444811680.

Almost surely, 2^21350959512 is an apocalyptic number.

It is an amenable number.

21350959512 is an abundant number, since it is smaller than the sum of its proper divisors (32026439328).

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

21350959512 is a wasteful number, since it uses less digits than its factorization.

21350959512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 889623322 (or 889623318 counting only the distinct ones).

The product of its (nonzero) digits is 121500, while the sum is 42.

The spelling of 21350959512 in words is "twenty-one billion, three hundred fifty million, nine hundred fifty-nine thousand, five hundred twelve".