21137156274 has 32 divisors (see below), whose sum is σ = 46297823040. Its totient is φ = 6393506112.

The previous prime is 21137156269. The next prime is 21137156279. The reversal of 21137156274 is 47265173112.

It is an interprime number because it is at equal distance from previous prime (21137156269) and next prime (21137156279).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (21137156279) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2291917 + ... + 2301120.

It is an arithmetic number, because the mean of its divisors is an integer number (1446806970).

Almost surely, 2^21137156274 is an apocalyptic number.

21137156274 is an abundant number, since it is smaller than the sum of its proper divisors (25160666766).

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

21137156274 is a wasteful number, since it uses less digits than its factorization.

21137156274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4593114.

The product of its digits is 70560, while the sum is 39.

The spelling of 21137156274 in words is "twenty-one billion, one hundred thirty-seven million, one hundred fifty-six thousand, two hundred seventy-four".