21974135016 has 16 divisors (see below), whose sum is σ = 54935337600. Its totient is φ = 7324711664.

The previous prime is 21974134991. The next prime is 21974135081. The reversal of 21974135016 is 61053147912.

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, 457794456 + ... + 457794503.

It is an arithmetic number, because the mean of its divisors is an integer number (3433458600).

Almost surely, 2^21974135016 is an apocalyptic number.

It is an amenable number.

21974135016 is an abundant number, since it is smaller than the sum of its proper divisors (32961202584).

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

21974135016 is a wasteful number, since it uses less digits than its factorization.

21974135016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 915588968 (or 915588964 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 39.

The spelling of 21974135016 in words is "twenty-one billion, nine hundred seventy-four million, one hundred thirty-five thousand, sixteen".