21348142536 has 32 divisors (see below), whose sum is σ = 60994693440. Its totient is φ = 6099469248.

The previous prime is 21348142511. The next prime is 21348142567. The reversal of 21348142536 is 63524184312.

It is a super-2 number, since 2×21348142536² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21348142494 and 21348142503.

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, 63535971 + ... + 63536306.

It is an arithmetic number, because the mean of its divisors is an integer number (1906084170).

Almost surely, 2^21348142536 is an apocalyptic number.

It is an amenable number.

21348142536 is an abundant number, since it is smaller than the sum of its proper divisors (39646550904).

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

21348142536 is a wasteful number, since it uses less digits than its factorization.

21348142536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127072293 (or 127072289 counting only the distinct ones).

The product of its digits is 138240, while the sum is 39.

The spelling of 21348142536 in words is "twenty-one billion, three hundred forty-eight million, one hundred forty-two thousand, five hundred thirty-six".