19157269540 has 24 divisors (see below), whose sum is σ = 40234787712. Its totient is φ = 7662046560.

The previous prime is 19157269493. The next prime is 19157269541. The reversal of 19157269540 is 4596275191.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (19157269541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146805 + ... + 244675.

It is an arithmetic number, because the mean of its divisors is an integer number (1676449488).

Almost surely, 2^19157269540 is an apocalyptic number.

19157269540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19157269540 is an abundant number, since it is smaller than the sum of its proper divisors (21077518172).

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

19157269540 is a wasteful number, since it uses less digits than its factorization.

19157269540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107667 (or 107665 counting only the distinct ones).

The product of its (nonzero) digits is 680400, while the sum is 49.

The spelling of 19157269540 in words is "nineteen billion, one hundred fifty-seven million, two hundred sixty-nine thousand, five hundred forty".