20447406954 has 24 divisors (see below), whose sum is σ = 47710616772. Its totient is φ = 6291509760.

The previous prime is 20447406949. The next prime is 20447406961. The reversal of 20447406954 is 45960474402.

It can be written as a sum of positive squares in 2 ways, for example, as 14367618225 + 6079788729 = 119865^2 + 77973^2 .

It is a super-2 number, since 2×20447406954² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

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, 43690807 + ... + 43691274.

Almost surely, 2^20447406954 is an apocalyptic number.

20447406954 is an abundant number, since it is smaller than the sum of its proper divisors (27263209818).

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

20447406954 is a wasteful number, since it uses less digits than its factorization.

20447406954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87382102 (or 87382099 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 45.

The spelling of 20447406954 in words is "twenty billion, four hundred forty-seven million, four hundred six thousand, nine hundred fifty-four".