21762419836 has 24 divisors (see below), whose sum is σ = 38380502160. Its totient is φ = 10796854272.

The previous prime is 21762419821. The next prime is 21762419837. The reversal of 21762419836 is 63891426712.

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 21762419836.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21762419837) 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, 264075 + ... + 336541.

It is an arithmetic number, because the mean of its divisors is an integer number (1599187590).

Almost surely, 2^21762419836 is an apocalyptic number.

It is an amenable number.

21762419836 is a deficient number, since it is larger than the sum of its proper divisors (16618082324).

21762419836 is a wasteful number, since it uses less digits than its factorization.

21762419836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73053 (or 73051 counting only the distinct ones).

The product of its digits is 870912, while the sum is 49.

The spelling of 21762419836 in words is "twenty-one billion, seven hundred sixty-two million, four hundred nineteen thousand, eight hundred thirty-six".