21450611105472 has 84 divisors (see below), whose sum is σ = 57845792131400. Its totient is φ = 7015294021632.

The previous prime is 21450611105467. The next prime is 21450611105513. The reversal of 21450611105472 is 27450111605412.

It is a self number, because there is not a number n which added to its sum of digits gives 21450611105472.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19347097 + ... + 20425752.

Almost surely, 2^{21450611105472} is an apocalyptic number.

It is an amenable number.

21450611105472 is an abundant number, since it is smaller than the sum of its proper divisors (36395181025928).

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

21450611105472 is an equidigital number, since it uses as much as digits as its factorization.

21450611105472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39772970 (or 39772907 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 39.

The spelling of 21450611105472 in words is "twenty-one trillion, four hundred fifty billion, six hundred eleven million, one hundred five thousand, four hundred seventy-two".