20343996 has 18 divisors (see below), whose sum is σ = 51425192. Its totient is φ = 6781320.

The previous prime is 20343991. The next prime is 20344007. The reversal of 20343996 is 69934302.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 565111 = 20343996 / (2 + 0 + 3 + 4 + 3 + 9 + 9 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 20343996.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20343991) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 282520 + ... + 282591.

Almost surely, 2^20343996 is an apocalyptic number.

It is an amenable number.

20343996 is an abundant number, since it is smaller than the sum of its proper divisors (31081196).

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

20343996 is a wasteful number, since it uses less digits than its factorization.

20343996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565121 (or 565116 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 36.

The square root of 20343996 is about 4510.4319083653. The cubic root of 20343996 is about 272.9891715707.

The spelling of 20343996 in words is "twenty million, three hundred forty-three thousand, nine hundred ninety-six".