20947272624 has 70 divisors (see below), whose sum is σ = 60850208636. Its totient is φ = 6982420320.

The previous prime is 20947272613. The next prime is 20947272629. The reversal of 20947272624 is 42627274902.

It is a happy number.

It is a super-4 number, since 4×20947272624⁴ (a number of 42 digits) contains 4444 as substring.

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 20947272624.

It is not an unprimeable number, because it can be changed into a prime (20947272629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 886282 + ... + 909609.

Almost surely, 2^20947272624 is an apocalyptic number.

20947272624 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20947272624 is an abundant number, since it is smaller than the sum of its proper divisors (39902936012).

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

20947272624 is an equidigital number, since it uses as much as digits as its factorization.

20947272624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1795917 (or 1795896 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 45.

The spelling of 20947272624 in words is "twenty billion, nine hundred forty-seven million, two hundred seventy-two thousand, six hundred twenty-four".