20473365631 has 2 divisors, whose sum is σ = 20473365632. Its totient is φ = 20473365630.

The previous prime is 20473365611. The next prime is 20473365637. The reversal of 20473365631 is 13656337402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20473365631 - 2⁹ = 20473365119 is a prime.

It is a super-2 number, since 2×20473365631² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20473365637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10236682815 + 10236682816.

It is an arithmetic number, because the mean of its divisors is an integer number (10236682816).

Almost surely, 2^20473365631 is an apocalyptic number.

20473365631 is a deficient number, since it is larger than the sum of its proper divisors (1).

20473365631 is an equidigital number, since it uses as much as digits as its factorization.

20473365631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 40.

The spelling of 20473365631 in words is "twenty billion, four hundred seventy-three million, three hundred sixty-five thousand, six hundred thirty-one".