19253977940 has 48 divisors (see below), whose sum is σ = 42590862720. Its totient is φ = 7291198080.

The previous prime is 19253977937. The next prime is 19253977949. The reversal of 19253977940 is 4977935291.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19253977949) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 557414 + ... + 590946.

It is an arithmetic number, because the mean of its divisors is an integer number (887309640).

Almost surely, 2^19253977940 is an apocalyptic number.

19253977940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19253977940 is an abundant number, since it is smaller than the sum of its proper divisors (23336884780).

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

19253977940 is a wasteful number, since it uses less digits than its factorization.

19253977940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35072 (or 35070 counting only the distinct ones).

The product of its (nonzero) digits is 4286520, while the sum is 56.

The spelling of 19253977940 in words is "nineteen billion, two hundred fifty-three million, nine hundred seventy-seven thousand, nine hundred forty".