17661996 has 48 divisors (see below), whose sum is σ = 49956480. Its totient is φ = 5351760.

The previous prime is 17661991. The next prime is 17662003. The reversal of 17661996 is 69916671.

It is a super-2 number, since 2×17661996² = 623892205408032, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (17661991) 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, 6246 + ... + 8621.

It is an arithmetic number, because the mean of its divisors is an integer number (1040760).

Almost surely, 2^17661996 is an apocalyptic number.

It is an amenable number.

17661996 is an abundant number, since it is smaller than the sum of its proper divisors (32294484).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

17661996 is a wasteful number, since it uses less digits than its factorization.

17661996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14891 (or 14883 counting only the distinct ones).

The product of its digits is 122472, while the sum is 45.

The square root of 17661996 is about 4202.6177556376. The cubic root of 17661996 is about 260.4233536786.

It can be divided in two parts, 176619 and 96, that added together give a triangular number (176715 = T₅₉₄).

The spelling of 17661996 in words is "seventeen million, six hundred sixty-one thousand, nine hundred ninety-six".