19136990 has 32 divisors (see below), whose sum is σ = 37048320. Its totient is φ = 7094304.

The previous prime is 19136963. The next prime is 19137007. The reversal of 19136990 is 9963191.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

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, 7859 + ... + 10001.

It is an arithmetic number, because the mean of its divisors is an integer number (1157760).

Almost surely, 2^19136990 is an apocalyptic number.

19136990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19136990 is the 3572-nd pentagonal number.

19136990 is a deficient number, since it is larger than the sum of its proper divisors (17911330).

19136990 is a wasteful number, since it uses less digits than its factorization.

19136990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2216.

The product of its (nonzero) digits is 13122, while the sum is 38.

The square root of 19136990 is about 4374.5845517032. The cubic root of 19136990 is about 267.4799356075.

The spelling of 19136990 in words is "nineteen million, one hundred thirty-six thousand, nine hundred ninety".