21958772082 has 16 divisors (see below), whose sum is σ = 47295816960. Its totient is φ = 6756545232.

The previous prime is 21958772039. The next prime is 21958772107. The reversal of 21958772082 is 28027785912.

It is a super-2 number, since 2×21958772082² (a number of 21 digits) contains 22 as substring.

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, 140761282 + ... + 140761437.

It is an arithmetic number, because the mean of its divisors is an integer number (2955988560).

Almost surely, 2^21958772082 is an apocalyptic number.

21958772082 is an abundant number, since it is smaller than the sum of its proper divisors (25337044878).

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

21958772082 is a wasteful number, since it uses less digits than its factorization.

21958772082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281522737.

The product of its (nonzero) digits is 1128960, while the sum is 51.

The spelling of 21958772082 in words is "twenty-one billion, nine hundred fifty-eight million, seven hundred seventy-two thousand, eighty-two".