20154405672 has 48 divisors (see below), whose sum is σ = 54593409780. Its totient is φ = 6717081600.

The previous prime is 20154405653. The next prime is 20154405683. The reversal of 20154405672 is 27650445102.

It is a happy number.

20154405672 is a `hidden beast` number, since 2 + 0 + 1 + 54 + 40 + 567 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 20154345156 + 60516 = 141966^2 + 246^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 539272 + ... + 575432.

Almost surely, 2^20154405672 is an apocalyptic number.

It is an amenable number.

20154405672 is an abundant number, since it is smaller than the sum of its proper divisors (34439004108).

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

20154405672 is a wasteful number, since it uses less digits than its factorization.

20154405672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43914 (or 43907 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 36.

The spelling of 20154405672 in words is "twenty billion, one hundred fifty-four million, four hundred five thousand, six hundred seventy-two".