19899274 has 16 divisors (see below), whose sum is σ = 30583008. Its totient is φ = 9707152.

The previous prime is 19899263. The next prime is 19899329. The reversal of 19899274 is 47299891.

It is a super-2 number, since 2×19899274² = 791962211454152, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23649 + ... + 24475.

It is an arithmetic number, because the mean of its divisors is an integer number (1911438).

Almost surely, 2^19899274 is an apocalyptic number.

19899274 is a deficient number, since it is larger than the sum of its proper divisors (10683734).

19899274 is a wasteful number, since it uses less digits than its factorization.

19899274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1109.

The product of its digits is 326592, while the sum is 49.

The square root of 19899274 is about 4460.8602309420. The cubic root of 19899274 is about 270.9853071377.

The spelling of 19899274 in words is "nineteen million, eight hundred ninety-nine thousand, two hundred seventy-four".