21612037272254 has 32 divisors (see below), whose sum is σ = 38095258449024. Its totient is φ = 9065675702880.

The previous prime is 21612037272247. The next prime is 21612037272257. The reversal of 21612037272254 is 45227273021612.

It is a super-2 number, since 2×21612037272254² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21612037272257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8509244 + ... + 10753199.

It is an arithmetic number, because the mean of its divisors is an integer number (1190476826532).

Almost surely, 2^{21612037272254} is an apocalyptic number.

21612037272254 is a deficient number, since it is larger than the sum of its proper divisors (16483221176770).

21612037272254 is a wasteful number, since it uses less digits than its factorization.

21612037272254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19266392.

The product of its (nonzero) digits is 564480, while the sum is 44.

The spelling of 21612037272254 in words is "twenty-one trillion, six hundred twelve billion, thirty-seven million, two hundred seventy-two thousand, two hundred fifty-four".