20524554451 has 2 divisors, whose sum is σ = 20524554452. Its totient is φ = 20524554450.

The previous prime is 20524554443. The next prime is 20524554467. The reversal of 20524554451 is 15445542502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20524554451 - 2³ = 20524554443 is a prime.

It is a super-2 number, since 2×20524554451² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20524554451.

It is not a weakly prime, because it can be changed into another prime (20524554751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10262277225 + 10262277226.

It is an arithmetic number, because the mean of its divisors is an integer number (10262277226).

Almost surely, 2^20524554451 is an apocalyptic number.

20524554451 is a deficient number, since it is larger than the sum of its proper divisors (1).

20524554451 is an equidigital number, since it uses as much as digits as its factorization.

20524554451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 160000, while the sum is 37.

The spelling of 20524554451 in words is "twenty billion, five hundred twenty-four million, five hundred fifty-four thousand, four hundred fifty-one".