21926498540 has 24 divisors (see below), whose sum is σ = 46057945920. Its totient is φ = 8768256768.

The previous prime is 21926498521. The next prime is 21926498563. The reversal of 21926498540 is 4589462912.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68660 + ... + 220379.

It is an arithmetic number, because the mean of its divisors is an integer number (1919081080).

Almost surely, 2^21926498540 is an apocalyptic number.

21926498540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21926498540 is an abundant number, since it is smaller than the sum of its proper divisors (24131447380).

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

21926498540 is a wasteful number, since it uses less digits than its factorization.

21926498540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292841 (or 292839 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 50.

The spelling of 21926498540 in words is "twenty-one billion, nine hundred twenty-six million, four hundred ninety-eight thousand, five hundred forty".