21657234010 has 32 divisors (see below), whose sum is σ = 40800972672. Its totient is φ = 8261183040.

The previous prime is 21657233993. The next prime is 21657234019. The reversal of 21657234010 is 1043275612.

It is not an unprimeable number, because it can be changed into a prime (21657234019) 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, 66109 + ... + 218368.

It is an arithmetic number, because the mean of its divisors is an integer number (1275030396).

Almost surely, 2^21657234010 is an apocalyptic number.

21657234010 is a deficient number, since it is larger than the sum of its proper divisors (19143738662).

21657234010 is a wasteful number, since it uses less digits than its factorization.

21657234010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284838.

The product of its (nonzero) digits is 10080, while the sum is 31.

The spelling of 21657234010 in words is "twenty-one billion, six hundred fifty-seven million, two hundred thirty-four thousand, ten".