21677797622 has 16 divisors (see below), whose sum is σ = 37077862752. Its totient is φ = 9416599680.

The previous prime is 21677797619. The next prime is 21677797649. The reversal of 21677797622 is 22679777612.

It is a happy number.

It is a congruent 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, 24521954 + ... + 24522837.

It is an arithmetic number, because the mean of its divisors is an integer number (2317366422).

Almost surely, 2^21677797622 is an apocalyptic number.

21677797622 is a deficient number, since it is larger than the sum of its proper divisors (15400065130).

21677797622 is a wasteful number, since it uses less digits than its factorization.

21677797622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49044823.

The product of its digits is 6223392, while the sum is 56.

The spelling of 21677797622 in words is "twenty-one billion, six hundred seventy-seven million, seven hundred ninety-seven thousand, six hundred twenty-two".