21477382052 has 24 divisors (see below), whose sum is σ = 42970245696. Its totient is φ = 9201274848.

The previous prime is 21477382027. The next prime is 21477382063. The reversal of 21477382052 is 25028377412.

It is a super-2 number, since 2×21477382052² (a number of 21 digits) contains 22 as substring.

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, 58343 + ... + 215310.

It is an arithmetic number, because the mean of its divisors is an integer number (1790426904).

Almost surely, 2^21477382052 is an apocalyptic number.

It is an amenable number.

21477382052 is an abundant number, since it is smaller than the sum of its proper divisors (21492863644).

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

21477382052 is a wasteful number, since it uses less digits than its factorization.

21477382052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276467 (or 276465 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 41.

The spelling of 21477382052 in words is "twenty-one billion, four hundred seventy-seven million, three hundred eighty-two thousand, fifty-two".