21054737076 has 24 divisors (see below), whose sum is σ = 50455497120. Its totient is φ = 6828563232.

The previous prime is 21054737071. The next prime is 21054737087. The reversal of 21054737076 is 67073745012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21054737071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23709846 + ... + 23710733.

It is an arithmetic number, because the mean of its divisors is an integer number (2102312380).

Almost surely, 2^21054737076 is an apocalyptic number.

It is an amenable number.

21054737076 is an abundant number, since it is smaller than the sum of its proper divisors (29400760044).

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

21054737076 is a wasteful number, since it uses less digits than its factorization.

21054737076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47420623 (or 47420621 counting only the distinct ones).

The product of its (nonzero) digits is 246960, while the sum is 42.

The spelling of 21054737076 in words is "twenty-one billion, fifty-four million, seven hundred thirty-seven thousand, seventy-six".