21863477304772 has 48 divisors (see below), whose sum is σ = 38806982468352. Its totient is φ = 10776778498080.

The previous prime is 21863477304769. The next prime is 21863477304793. The reversal of 21863477304772 is 27740377436812.

It is a self number, because there is not a number n which added to its sum of digits gives 21863477304772.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 993647923 + ... + 993669925.

It is an arithmetic number, because the mean of its divisors is an integer number (808478801424).

Almost surely, 2^{21863477304772} is an apocalyptic number.

It is an amenable number.

21863477304772 is a deficient number, since it is larger than the sum of its proper divisors (16943505163580).

21863477304772 is a wasteful number, since it uses less digits than its factorization.

21863477304772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33328 (or 33326 counting only the distinct ones).

The product of its (nonzero) digits is 66382848, while the sum is 61.

The spelling of 21863477304772 in words is "twenty-one trillion, eight hundred sixty-three billion, four hundred seventy-seven million, three hundred four thousand, seven hundred seventy-two".