21362762872 has 32 divisors (see below), whose sum is σ = 43746318000. Its totient is φ = 9699289600.

The previous prime is 21362762867. The next prime is 21362762881. The reversal of 21362762872 is 27826726312.

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, 60247 + ... + 215302.

Almost surely, 2^21362762872 is an apocalyptic number.

21362762872 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21362762872 is an abundant number, since it is smaller than the sum of its proper divisors (22383555128).

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

21362762872 is a wasteful number, since it uses less digits than its factorization.

21362762872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276447 (or 276443 counting only the distinct ones).

The product of its digits is 677376, while the sum is 46.

The spelling of 21362762872 in words is "twenty-one billion, three hundred sixty-two million, seven hundred sixty-two thousand, eight hundred seventy-two".