21274653037 has 4 divisors (see below), whose sum is σ = 23208712416. Its totient is φ = 19340593660.

The previous prime is 21274653013. The next prime is 21274653041. The reversal of 21274653037 is 73035647212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21274653037 - 2¹¹ = 21274650989 is a prime.

It is a super-2 number, since 2×21274653037² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21274653437) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 967029673 + ... + 967029694.

It is an arithmetic number, because the mean of its divisors is an integer number (5802178104).

Almost surely, 2^21274653037 is an apocalyptic number.

It is an amenable number.

21274653037 is a deficient number, since it is larger than the sum of its proper divisors (1934059379).

21274653037 is a wasteful number, since it uses less digits than its factorization.

21274653037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1934059378.

The product of its (nonzero) digits is 211680, while the sum is 40.

The spelling of 21274653037 in words is "twenty-one billion, two hundred seventy-four million, six hundred fifty-three thousand, thirty-seven".