18920770452 has 48 divisors (see below), whose sum is σ = 49195312320. Its totient is φ = 6288735456.

The previous prime is 18920770403. The next prime is 18920770471. The reversal of 18920770452 is 25407702981.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 18920770398 and 18920770407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 214963 + ... + 289914.

It is an arithmetic number, because the mean of its divisors is an integer number (1024902340).

Almost surely, 2^18920770452 is an apocalyptic number.

18920770452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18920770452 is an abundant number, since it is smaller than the sum of its proper divisors (30274541868).

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

18920770452 is a wasteful number, since it uses less digits than its factorization.

18920770452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505237 (or 505229 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 45.

The spelling of 18920770452 in words is "eighteen billion, nine hundred twenty million, seven hundred seventy thousand, four hundred fifty-two".