19457925780 has 24 divisors (see below), whose sum is σ = 54482192352. Its totient is φ = 5188780192.

The previous prime is 19457925757. The next prime is 19457925793. The reversal of 19457925780 is 8752975491.

It is a super-2 number, since 2×19457925780² (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 19457925780.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162149322 + ... + 162149441.

It is an arithmetic number, because the mean of its divisors is an integer number (2270091348).

Almost surely, 2^19457925780 is an apocalyptic number.

19457925780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19457925780 is an abundant number, since it is smaller than the sum of its proper divisors (35024266572).

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

19457925780 is a wasteful number, since it uses less digits than its factorization.

19457925780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324298775 (or 324298773 counting only the distinct ones).

The product of its (nonzero) digits is 6350400, while the sum is 57.

The spelling of 19457925780 in words is "nineteen billion, four hundred fifty-seven million, nine hundred twenty-five thousand, seven hundred eighty".