21980794134 has 32 divisors (see below), whose sum is σ = 47350727424. Its totient is φ = 6762252960.

The previous prime is 21980794127. The next prime is 21980794163. The reversal of 21980794134 is 43149708912.

It is a super-2 number, since 2×21980794134² (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, 577719 + ... + 614589.

It is an arithmetic number, because the mean of its divisors is an integer number (1479710232).

Almost surely, 2^21980794134 is an apocalyptic number.

21980794134 is an abundant number, since it is smaller than the sum of its proper divisors (25369933290).

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

21980794134 is a wasteful number, since it uses less digits than its factorization.

21980794134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44532.

The product of its (nonzero) digits is 435456, while the sum is 48.

The spelling of 21980794134 in words is "twenty-one billion, nine hundred eighty million, seven hundred ninety-four thousand, one hundred thirty-four".