20544467400 has 120 divisors (see below), whose sum is σ = 71354035170. Its totient is φ = 5478520320.

The previous prime is 20544467393. The next prime is 20544467443. The reversal of 20544467400 is 476444502.

20544467400 is a `hidden beast` number, since 2 + 0 + 544 + 46 + 74 + 0 + 0 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 18679782276 + 1864685124 = 136674^2 + 43182^2 .

It is a tau number, because it is divible by the number of its divisors (120).

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 29 ways as a sum of consecutive naturals, for example, 617889 + ... + 650288.

Almost surely, 2^20544467400 is an apocalyptic number.

20544467400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20544467400 is an abundant number, since it is smaller than the sum of its proper divisors (50809567770).

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

20544467400 is a wasteful number, since it uses less digits than its factorization.

20544467400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1268205 (or 1268187 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 36.

The spelling of 20544467400 in words is "twenty billion, five hundred forty-four million, four hundred sixty-seven thousand, four hundred".