21282761612 has 48 divisors (see below), whose sum is σ = 45249550080. Its totient is φ = 8555544000.

The previous prime is 21282761581. The next prime is 21282761623. The reversal of 21282761612 is 21616728212.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144314 + ... + 251777.

It is an arithmetic number, because the mean of its divisors is an integer number (942698960).

Almost surely, 2^21282761612 is an apocalyptic number.

It is an amenable number.

21282761612 is an abundant number, since it is smaller than the sum of its proper divisors (23966788468).

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

21282761612 is a wasteful number, since it uses less digits than its factorization.

21282761612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396222 (or 396220 counting only the distinct ones).

The product of its digits is 32256, while the sum is 38.

The spelling of 21282761612 in words is "twenty-one billion, two hundred eighty-two million, seven hundred sixty-one thousand, six hundred twelve".