21037274012 has 24 divisors (see below), whose sum is σ = 38844981840. Its totient is φ = 9941339520.

The previous prime is 21037274009. The next prime is 21037274017. The reversal of 21037274012 is 21047273012.

It is a super-2 number, since 2×21037274012² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21037274017) 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, 296753 + ... + 360744.

It is an arithmetic number, because the mean of its divisors is an integer number (1618540910).

Almost surely, 2^21037274012 is an apocalyptic number.

It is an amenable number.

21037274012 is a deficient number, since it is larger than the sum of its proper divisors (17807707828).

21037274012 is a wasteful number, since it uses less digits than its factorization.

21037274012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657941 (or 657939 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 29.

The spelling of 21037274012 in words is "twenty-one billion, thirty-seven million, two hundred seventy-four thousand, twelve".