20252415551 has 2 divisors, whose sum is σ = 20252415552. Its totient is φ = 20252415550.

The previous prime is 20252415523. The next prime is 20252415563. The reversal of 20252415551 is 15551425202.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20252415551 - 2⁶ = 20252415487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20252415451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10126207775 + 10126207776.

It is an arithmetic number, because the mean of its divisors is an integer number (10126207776).

Almost surely, 2^20252415551 is an apocalyptic number.

20252415551 is a deficient number, since it is larger than the sum of its proper divisors (1).

20252415551 is an equidigital number, since it uses as much as digits as its factorization.

20252415551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20000, while the sum is 32.

The spelling of 20252415551 in words is "twenty billion, two hundred fifty-two million, four hundred fifteen thousand, five hundred fifty-one".