21238971410 has 16 divisors (see below), whose sum is σ = 39463379712. Its totient is φ = 8221537200.

The previous prime is 21238971409. The next prime is 21238971449. The reversal of 21238971410 is 1417983212.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34256096 + ... + 34256715.

It is an arithmetic number, because the mean of its divisors is an integer number (2466461232).

Almost surely, 2^21238971410 is an apocalyptic number.

21238971410 is a deficient number, since it is larger than the sum of its proper divisors (18224408302).

21238971410 is a wasteful number, since it uses less digits than its factorization.

21238971410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68512849.

The product of its (nonzero) digits is 24192, while the sum is 38.

The spelling of 21238971410 in words is "twenty-one billion, two hundred thirty-eight million, nine hundred seventy-one thousand, four hundred ten".