19952090 has 32 divisors (see below), whose sum is σ = 38085120. Its totient is φ = 7504704.

The previous prime is 19952077. The next prime is 19952099. The reversal of 19952090 is 9025991.

It is a self number, because there is not a number n which added to its sum of digits gives 19952090.

It is not an unprimeable number, because it can be changed into a prime (19952099) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32567 + ... + 33173.

It is an arithmetic number, because the mean of its divisors is an integer number (1190160).

Almost surely, 2^19952090 is an apocalyptic number.

19952090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19952090 is a deficient number, since it is larger than the sum of its proper divisors (18133030).

19952090 is a wasteful number, since it uses less digits than its factorization.

19952090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 806.

The product of its (nonzero) digits is 7290, while the sum is 35.

The square root of 19952090 is about 4466.7762424370. The cubic root of 19952090 is about 271.2248421102.

The spelling of 19952090 in words is "nineteen million, nine hundred fifty-two thousand, ninety".