19139900 has 36 divisors (see below), whose sum is σ = 44731512. Its totient is φ = 7066560.

The previous prime is 19139893. The next prime is 19139921. The reversal of 19139900 is 993191.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6062 + ... + 8661.

It is an arithmetic number, because the mean of its divisors is an integer number (1242542).

Almost surely, 2^19139900 is an apocalyptic number.

19139900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19139900 is an abundant number, since it is smaller than the sum of its proper divisors (25591612).

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

19139900 is a wasteful number, since it uses less digits than its factorization.

19139900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14750 (or 14743 counting only the distinct ones).

The product of its (nonzero) digits is 2187, while the sum is 32.

The square root of 19139900 is about 4374.9171420725. The cubic root of 19139900 is about 267.4934927232.

The spelling of 19139900 in words is "nineteen million, one hundred thirty-nine thousand, nine hundred".