20875401551 has 2 divisors, whose sum is σ = 20875401552. Its totient is φ = 20875401550.

The previous prime is 20875401539. The next prime is 20875401563. The reversal of 20875401551 is 15510457802.

It is a balanced prime because it is at equal distance from previous prime (20875401539) and next prime (20875401563).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20875401551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20875401511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10437700775 + 10437700776.

It is an arithmetic number, because the mean of its divisors is an integer number (10437700776).

Almost surely, 2^20875401551 is an apocalyptic number.

20875401551 is a deficient number, since it is larger than the sum of its proper divisors (1).

20875401551 is an equidigital number, since it uses as much as digits as its factorization.

20875401551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56000, while the sum is 38.

The spelling of 20875401551 in words is "twenty billion, eight hundred seventy-five million, four hundred one thousand, five hundred fifty-one".