21367352952 has 48 divisors (see below), whose sum is σ = 63130817880. Its totient is φ = 6474955200.

The previous prime is 21367352939. The next prime is 21367352953. The reversal of 21367352952 is 25925376312.

21367352952 is a `hidden beast` number, since 2 + 1 + 3 + 6 + 73 + 529 + 52 = 666.

It is a super-2 number, since 2×21367352952² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21367352898 and 21367352907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21367352953) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13488699 + ... + 13490282.

Almost surely, 2^21367352952 is an apocalyptic number.

21367352952 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21367352952 is an abundant number, since it is smaller than the sum of its proper divisors (41763464928).

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

21367352952 is a wasteful number, since it uses less digits than its factorization.

21367352952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26979004 (or 26978997 counting only the distinct ones).

The product of its digits is 680400, while the sum is 45.

The spelling of 21367352952 in words is "twenty-one billion, three hundred sixty-seven million, three hundred fifty-two thousand, nine hundred fifty-two".