20425122777 has 16 divisors (see below), whose sum is σ = 27285647040. Its totient is φ = 13590700032.

The previous prime is 20425122761. The next prime is 20425122841. The reversal of 20425122777 is 77722152402.

It is not a de Polignac number, because 20425122777 - 2⁴ = 20425122761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20425122727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6133849 + ... + 6137177.

It is an arithmetic number, because the mean of its divisors is an integer number (1705352940).

Almost surely, 2^20425122777 is an apocalyptic number.

It is an amenable number.

20425122777 is a deficient number, since it is larger than the sum of its proper divisors (6860524263).

20425122777 is a wasteful number, since it uses less digits than its factorization.

20425122777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6632.

The product of its (nonzero) digits is 109760, while the sum is 39.

The spelling of 20425122777 in words is "twenty billion, four hundred twenty-five million, one hundred twenty-two thousand, seven hundred seventy-seven".