19123980 has 48 divisors (see below), whose sum is σ = 56700000. Its totient is φ = 4799488.

The previous prime is 19123969. The next prime is 19123991. The reversal of 19123980 is 8932191.

It is an interprime number because it is at equal distance from previous prime (19123969) and next prime (19123991).

It is a super-2 number, since 2×19123980² = 731453222080800, which contains 22 as substring.

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, 8355 + ... + 10394.

It is an arithmetic number, because the mean of its divisors is an integer number (1181250).

Almost surely, 2^19123980 is an apocalyptic number.

19123980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19123980 is an abundant number, since it is smaller than the sum of its proper divisors (37576020).

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

19123980 is a wasteful number, since it uses less digits than its factorization.

19123980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18778 (or 18776 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 19123980 is about 4373.0973005411. The cubic root of 19123980 is about 267.4193077719.

The spelling of 19123980 in words is "nineteen million, one hundred twenty-three thousand, nine hundred eighty".