21537051106 has 8 divisors (see below), whose sum is σ = 32350510080. Its totient is φ = 10753547748.

The previous prime is 21537051061. The next prime is 21537051113. The reversal of 21537051106 is 60115073512.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7487106 + ... + 7489981.

It is an arithmetic number, because the mean of its divisors is an integer number (4043813760).

Almost surely, 2^21537051106 is an apocalyptic number.

21537051106 is a deficient number, since it is larger than the sum of its proper divisors (10813458974).

21537051106 is a wasteful number, since it uses less digits than its factorization.

21537051106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14977808.

The product of its (nonzero) digits is 6300, while the sum is 31.

The spelling of 21537051106 in words is "twenty-one billion, five hundred thirty-seven million, fifty-one thousand, one hundred six".