19997410 has 16 divisors (see below), whose sum is σ = 36401400. Its totient is φ = 7908736.

The previous prime is 19997399. The next prime is 19997413. The reversal of 19997410 is 1479991.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 15515721 + 4481689 = 3939^2 + 2117^2 .

It is not an unprimeable number, because it can be changed into a prime (19997413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10345 + ... + 12124.

Almost surely, 2^19997410 is an apocalyptic number.

19997410 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19997410 is a deficient number, since it is larger than the sum of its proper divisors (16403990).

19997410 is a wasteful number, since it uses less digits than its factorization.

19997410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22565.

The product of its (nonzero) digits is 20412, while the sum is 40.

The square root of 19997410 is about 4471.8463748210. The cubic root of 19997410 is about 271.4300439176.

It can be divided in two parts, 1999 and 7410, that added together give a square (9409 = 97²).

The spelling of 19997410 in words is "nineteen million, nine hundred ninety-seven thousand, four hundred ten".