21790167792 has 40 divisors (see below), whose sum is σ = 59602520016. Its totient is φ = 6836130816.

The previous prime is 21790167779. The next prime is 21790167821. The reversal of 21790167792 is 29776109712.

It is a super-2 number, since 2×21790167792² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

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, 13351003 + ... + 13352634.

Almost surely, 2^21790167792 is an apocalyptic number.

It is an amenable number.

21790167792 is an abundant number, since it is smaller than the sum of its proper divisors (37812352224).

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

21790167792 is a wasteful number, since it uses less digits than its factorization.

21790167792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26703665 (or 26703659 counting only the distinct ones).

The product of its (nonzero) digits is 666792, while the sum is 51.

The spelling of 21790167792 in words is "twenty-one billion, seven hundred ninety million, one hundred sixty-seven thousand, seven hundred ninety-two".