20972624047 has 2 divisors, whose sum is σ = 20972624048. Its totient is φ = 20972624046.

The previous prime is 20972624003. The next prime is 20972624069. The reversal of 20972624047 is 74042627902.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20972624047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20972623994 and 20972624012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20972624947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10486312023 + 10486312024.

It is an arithmetic number, because the mean of its divisors is an integer number (10486312024).

Almost surely, 2^20972624047 is an apocalyptic number.

20972624047 is a deficient number, since it is larger than the sum of its proper divisors (1).

20972624047 is an equidigital number, since it uses as much as digits as its factorization.

20972624047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 338688, while the sum is 43.

The spelling of 20972624047 in words is "twenty billion, nine hundred seventy-two million, six hundred twenty-four thousand, forty-seven".