20677054747 has 2 divisors, whose sum is σ = 20677054748. Its totient is φ = 20677054746.

The previous prime is 20677054679. The next prime is 20677054751. The reversal of 20677054747 is 74745077602.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20677054747 - 2²⁷ = 20542837019 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20677054747.

It is not a weakly prime, because it can be changed into another prime (20677054757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10338527373 + 10338527374.

It is an arithmetic number, because the mean of its divisors is an integer number (10338527374).

Almost surely, 2^20677054747 is an apocalyptic number.

20677054747 is a deficient number, since it is larger than the sum of its proper divisors (1).

20677054747 is an equidigital number, since it uses as much as digits as its factorization.

20677054747 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304960, while the sum is 49.

The spelling of 20677054747 in words is "twenty billion, six hundred seventy-seven million, fifty-four thousand, seven hundred forty-seven".