26620454920 has 16 divisors (see below), whose sum is σ = 59896023660. Its totient is φ = 10648181952.

The previous prime is 26620454897. The next prime is 26620454923. The reversal of 26620454920 is 2945402662.

It can be written as a sum of positive squares in 2 ways, for example, as 22304227716 + 4316227204 = 149346^2 + 65698^2 .

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 665511373 = 26620454920 / (2 + 6 + 6 + 2 + 0 + 4 + 5 + 4 + 9 + 2 + 0).

It is not an unprimeable number, because it can be changed into a prime (26620454923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 332755647 + ... + 332755726.

Almost surely, 2^26620454920 is an apocalyptic number.

26620454920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26620454920 is an abundant number, since it is smaller than the sum of its proper divisors (33275568740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26620454920 is a wasteful number, since it uses less digits than its factorization.

26620454920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665511384 (or 665511380 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 40.

The spelling of 26620454920 in words is "twenty-six billion, six hundred twenty million, four hundred fifty-four thousand, nine hundred twenty".