21376026804 has 48 divisors (see below), whose sum is σ = 54507188736. Its totient is φ = 6466216800.

The previous prime is 21376026769. The next prime is 21376026811. The reversal of 21376026804 is 40862067312.

It is a happy number.

It is a super-3 number, since 3×21376026804³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66432 + ... + 217175.

It is an arithmetic number, because the mean of its divisors is an integer number (1135566432).

Almost surely, 2^21376026804 is an apocalyptic number.

It is an amenable number.

21376026804 is an abundant number, since it is smaller than the sum of its proper divisors (33131161932).

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

21376026804 is a wasteful number, since it uses less digits than its factorization.

21376026804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284196 (or 284194 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 39.

The spelling of 21376026804 in words is "twenty-one billion, three hundred seventy-six million, twenty-six thousand, eight hundred four".