21570373814 has 16 divisors (see below), whose sum is σ = 35356519440. Its totient is φ = 9788175360.

The previous prime is 21570373813. The next prime is 21570373817. The reversal of 21570373814 is 41837307512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21570373813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 813659 + ... + 839750.

It is an arithmetic number, because the mean of its divisors is an integer number (2209782465).

Almost surely, 2^21570373814 is an apocalyptic number.

21570373814 is a deficient number, since it is larger than the sum of its proper divisors (13786145626).

21570373814 is a wasteful number, since it uses less digits than its factorization.

21570373814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1654015.

The product of its (nonzero) digits is 141120, while the sum is 41.

The spelling of 21570373814 in words is "twenty-one billion, five hundred seventy million, three hundred seventy-three thousand, eight hundred fourteen".