19949290 has 16 divisors (see below), whose sum is σ = 36879912. Its totient is φ = 7763904.

The previous prime is 19949273. The next prime is 19949333. The reversal of 19949290 is 9294991.

It can be written as a sum of positive squares in 4 ways, for example, as 15610401 + 4338889 = 3951^2 + 2083^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26589 + ... + 27328.

Almost surely, 2^19949290 is an apocalyptic number.

19949290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19949290 is a deficient number, since it is larger than the sum of its proper divisors (16930622).

19949290 is a wasteful number, since it uses less digits than its factorization.

19949290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53961.

The product of its (nonzero) digits is 52488, while the sum is 43.

The square root of 19949290 is about 4466.4628062931. The cubic root of 19949290 is about 271.2121539643.

The spelling of 19949290 in words is "nineteen million, nine hundred forty-nine thousand, two hundred ninety".