21563341154412 has 24 divisors (see below), whose sum is σ = 50314868348976. Its totient is φ = 7187722434048.

The previous prime is 21563341154359. The next prime is 21563341154447. The reversal of 21563341154412 is 21445114336512.

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, 5679933 + ... + 8682644.

It is an arithmetic number, because the mean of its divisors is an integer number (2096452847874).

Almost surely, 2^{21563341154412} is an apocalyptic number.

It is an amenable number.

21563341154412 is an abundant number, since it is smaller than the sum of its proper divisors (28751527194564).

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

21563341154412 is a wasteful number, since it uses less digits than its factorization.

21563341154412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14487697 (or 14487695 counting only the distinct ones).

The product of its digits is 345600, while the sum is 42.

The spelling of 21563341154412 in words is "twenty-one trillion, five hundred sixty-three billion, three hundred forty-one million, one hundred fifty-four thousand, four hundred twelve".