21237161254 has 8 divisors (see below), whose sum is σ = 32258979360. Its totient is φ = 10484168136.

The previous prime is 21237161249. The next prime is 21237161269. The reversal of 21237161254 is 45216173212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67206049 + ... + 67206364.

It is an arithmetic number, because the mean of its divisors is an integer number (4032372420).

Almost surely, 2^21237161254 is an apocalyptic number.

21237161254 is a deficient number, since it is larger than the sum of its proper divisors (11021818106).

21237161254 is a wasteful number, since it uses less digits than its factorization.

21237161254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134412494.

The product of its digits is 20160, while the sum is 34.

The spelling of 21237161254 in words is "twenty-one billion, two hundred thirty-seven million, one hundred sixty-one thousand, two hundred fifty-four".