21227373574 has 16 divisors (see below), whose sum is σ = 34749421200. Its totient is φ = 9644995360.

The previous prime is 21227373533. The next prime is 21227373577. The reversal of 21227373574 is 47537372212.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21227373574.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21227373577) 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, 133189 + ... + 245344.

It is an arithmetic number, because the mean of its divisors is an integer number (2171838825).

Almost surely, 2^21227373574 is an apocalyptic number.

21227373574 is a deficient number, since it is larger than the sum of its proper divisors (13522047626).

21227373574 is a wasteful number, since it uses less digits than its factorization.

21227373574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381095.

The product of its digits is 493920, while the sum is 43.

The spelling of 21227373574 in words is "twenty-one billion, two hundred twenty-seven million, three hundred seventy-three thousand, five hundred seventy-four".