19990592 has 14 divisors (see below), whose sum is σ = 39668958. Its totient is φ = 9995264.

The previous prime is 19990591. The next prime is 19990601. The reversal of 19990592 is 29509991.

It can be written as a sum of positive squares in only one way, i.e., 16516096 + 3474496 = 4064^2 + 1864^2 .

It is not an unprimeable number, because it can be changed into a prime (19990591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156113 + ... + 156240.

It is an arithmetic number, because the mean of its divisors is an integer number (2833497).

Almost surely, 2^19990592 is an apocalyptic number.

It is an amenable number.

19990592 is a deficient number, since it is larger than the sum of its proper divisors (19678366).

19990592 is an equidigital number, since it uses as much as digits as its factorization.

19990592 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312365 (or 312355 counting only the distinct ones).

The product of its (nonzero) digits is 65610, while the sum is 44.

The square root of 19990592 is about 4471.0839848967. The cubic root of 19990592 is about 271.3991929158.

The spelling of 19990592 in words is "nineteen million, nine hundred ninety thousand, five hundred ninety-two".