21469868676 has 27 divisors (see below), whose sum is σ = 54273279333. Its totient is φ = 7156329840.

The previous prime is 21469868669. The next prime is 21469868687. The reversal of 21469868676 is 67686896412.

The square root of 21469868676 is 146526.

It is a perfect power (a square), and thus also a powerful number.

21469868676 is a `hidden beast` number, since 21 + 469 + 8 + 6 + 86 + 76 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1758276 + 21468110400 = 1326^2 + 146520^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 866946 + ... + 891366.

Almost surely, 2^21469868676 is an apocalyptic number.

21469868676 is the 146526-th square number.

It is an amenable number.

21469868676 is an abundant number, since it is smaller than the sum of its proper divisors (32803410657).

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

21469868676 is an frugal number, since it uses more digits than its factorization.

21469868676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48852 (or 24426 counting only the distinct ones).

The product of its digits is 41803776, while the sum is 63.

The spelling of 21469868676 in words is "twenty-one billion, four hundred sixty-nine million, eight hundred sixty-eight thousand, six hundred seventy-six".