20372266451 has 2 divisors, whose sum is σ = 20372266452. Its totient is φ = 20372266450.

The previous prime is 20372266433. The next prime is 20372266531. The reversal of 20372266451 is 15466227302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20372266451 - 2¹⁰ = 20372265427 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (20372266151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10186133225 + 10186133226.

It is an arithmetic number, because the mean of its divisors is an integer number (10186133226).

Almost surely, 2^20372266451 is an apocalyptic number.

20372266451 is a deficient number, since it is larger than the sum of its proper divisors (1).

20372266451 is an equidigital number, since it uses as much as digits as its factorization.

20372266451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 38.

The spelling of 20372266451 in words is "twenty billion, three hundred seventy-two million, two hundred sixty-six thousand, four hundred fifty-one".