21127958070 has 32 divisors (see below), whose sum is σ = 50867081568. Its totient is φ = 5616346368.

The previous prime is 21127958051. The next prime is 21127958087. The reversal of 21127958070 is 7085972112.

It is a super-2 number, since 2×21127958070² (a number of 21 digits) 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 15 ways as a sum of consecutive naturals, for example, 1101319 + ... + 1120338.

It is an arithmetic number, because the mean of its divisors is an integer number (1589596299).

Almost surely, 2^21127958070 is an apocalyptic number.

21127958070 is an abundant number, since it is smaller than the sum of its proper divisors (29739123498).

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

21127958070 is a wasteful number, since it uses less digits than its factorization.

21127958070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2221984.

The product of its (nonzero) digits is 70560, while the sum is 42.

The spelling of 21127958070 in words is "twenty-one billion, one hundred twenty-seven million, nine hundred fifty-eight thousand, seventy".