21357467436 has 24 divisors (see below), whose sum is σ = 49840382704. Its totient is φ = 7118256960.

The previous prime is 21357467423. The next prime is 21357467491. The reversal of 21357467436 is 63476475312.

It is a super-2 number, since 2×21357467436² (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, 9595 + ... + 206898.

Almost surely, 2^21357467436 is an apocalyptic number.

It is an amenable number.

21357467436 is an abundant number, since it is smaller than the sum of its proper divisors (28482915268).

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

21357467436 is a wasteful number, since it uses less digits than its factorization.

21357467436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224721 (or 224719 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 48.

The spelling of 21357467436 in words is "twenty-one billion, three hundred fifty-seven million, four hundred sixty-seven thousand, four hundred thirty-six".