20472493824 has 72 divisors (see below), whose sum is σ = 60540786320. Its totient is φ = 6824162304.

The previous prime is 20472493823. The next prime is 20472493829. The reversal of 20472493824 is 42839427402.

It is a happy number.

20472493824 is a `hidden beast` number, since 20 + 4 + 7 + 249 + 382 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 20472493824.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20472493823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1474027 + ... + 1487850.

Almost surely, 2^20472493824 is an apocalyptic number.

20472493824 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20472493824 is an abundant number, since it is smaller than the sum of its proper divisors (40068292496).

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

20472493824 is an equidigital number, since it uses as much as digits as its factorization.

20472493824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2961902 (or 2961882 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 45.

The spelling of 20472493824 in words is "twenty billion, four hundred seventy-two million, four hundred ninety-three thousand, eight hundred twenty-four".