21677796 has 54 divisors (see below), whose sum is σ = 63748230. Its totient is φ = 6193152.

The previous prime is 21677779. The next prime is 21677809. The reversal of 21677796 is 69777612.

It can be written as a sum of positive squares in only one way, i.e., 20575296 + 1102500 = 4536^2 + 1050^2 .

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4381 + ... + 7908.

Almost surely, 2^21677796 is an apocalyptic number.

It is an amenable number.

21677796 is an abundant number, since it is smaller than the sum of its proper divisors (42070434).

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

21677796 is a wasteful number, since it uses less digits than its factorization.

21677796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12313 (or 12301 counting only the distinct ones).

The product of its digits is 222264, while the sum is 45.

The square root of 21677796 is about 4655.9420099481. The cubic root of 21677796 is about 278.8292785290.

The spelling of 21677796 in words is "twenty-one million, six hundred seventy-seven thousand, seven hundred ninety-six".