21773066504 has 64 divisors (see below), whose sum is σ = 49144704000. Its totient is φ = 9030268800.

The previous prime is 21773066503. The next prime is 21773066507. The reversal of 21773066504 is 40566037712.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (21773066503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42917 + ... + 213044.

It is an arithmetic number, because the mean of its divisors is an integer number (767886000).

Almost surely, 2^21773066504 is an apocalyptic number.

It is an amenable number.

21773066504 is an abundant number, since it is smaller than the sum of its proper divisors (27371637496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21773066504 is a wasteful number, since it uses less digits than its factorization.

21773066504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256019 (or 256001 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 41.

The spelling of 21773066504 in words is "twenty-one billion, seven hundred seventy-three million, sixty-six thousand, five hundred four".