20402632451 has 2 divisors, whose sum is σ = 20402632452. Its totient is φ = 20402632450.

The previous prime is 20402632447. The next prime is 20402632469. The reversal of 20402632451 is 15423620402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20402632451 - 2² = 20402632447 is a prime.

It is not a weakly prime, because it can be changed into another prime (20402632441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10201316225 + 10201316226.

It is an arithmetic number, because the mean of its divisors is an integer number (10201316226).

Almost surely, 2^20402632451 is an apocalyptic number.

20402632451 is a deficient number, since it is larger than the sum of its proper divisors (1).

20402632451 is an equidigital number, since it uses as much as digits as its factorization.

20402632451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 29.

The spelling of 20402632451 in words is "twenty billion, four hundred two million, six hundred thirty-two thousand, four hundred fifty-one".