21237460254 has 32 divisors (see below), whose sum is σ = 49678272000. Its totient is φ = 6706566072.

The previous prime is 21237460247. The next prime is 21237460267. The reversal of 21237460254 is 45206473212.

21237460254 is a `hidden beast` number, since 2 + 12 + 37 + 4 + 602 + 5 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10348614 + ... + 10350665.

It is an arithmetic number, because the mean of its divisors is an integer number (1552446000).

Almost surely, 2^21237460254 is an apocalyptic number.

21237460254 is an abundant number, since it is smaller than the sum of its proper divisors (28440811746).

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

21237460254 is a wasteful number, since it uses less digits than its factorization.

21237460254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20699309 (or 20699303 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

The spelling of 21237460254 in words is "twenty-one billion, two hundred thirty-seven million, four hundred sixty thousand, two hundred fifty-four".