21345454312 has 32 divisors (see below), whose sum is σ = 49258742400. Its totient is φ = 8444355264.

The previous prime is 21345454307. The next prime is 21345454343.

21345454312 is nontrivially palindromic in base 10.

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, 14659612 + ... + 14661067.

It is an arithmetic number, because the mean of its divisors is an integer number (1539335700).

Almost surely, 2^21345454312 is an apocalyptic number.

It is an amenable number.

21345454312 is an abundant number, since it is smaller than the sum of its proper divisors (27913288088).

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

21345454312 is a wasteful number, since it uses less digits than its factorization.

21345454312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29320705 (or 29320701 counting only the distinct ones).

The product of its digits is 57600, while the sum is 34.

The spelling of 21345454312 in words is "twenty-one billion, three hundred forty-five million, four hundred fifty-four thousand, three hundred twelve".