20342788 has 12 divisors (see below), whose sum is σ = 35642572. Its totient is φ = 10159200.

The previous prime is 20342783. The next prime is 20342801. The reversal of 20342788 is 88724302.

It can be written as a sum of positive squares in 2 ways, for example, as 6563844 + 13778944 = 2562^2 + 3712^2 .

It is a super-2 number, since 2×20342788² = 827658047225888, which contains 22 as substring.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (20342783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1438 + ... + 6538.

Almost surely, 2^20342788 is an apocalyptic number.

It is an amenable number.

20342788 is a deficient number, since it is larger than the sum of its proper divisors (15299784).

20342788 is a wasteful number, since it uses less digits than its factorization.

20342788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6102 (or 6100 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 20342788 is about 4510.2979945897. The cubic root of 20342788 is about 272.9837682165.

The spelling of 20342788 in words is "twenty million, three hundred forty-two thousand, seven hundred eighty-eight".