20290996 has 24 divisors (see below), whose sum is σ = 41017536. Its totient is φ = 8680320.

The previous prime is 20290973. The next prime is 20290999. The reversal of 20290996 is 69909202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20290999) 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, 12816 + ... + 14311.

It is an arithmetic number, because the mean of its divisors is an integer number (1709064).

Almost surely, 2^20290996 is an apocalyptic number.

It is an amenable number.

20290996 is an abundant number, since it is smaller than the sum of its proper divisors (20726540).

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

20290996 is a wasteful number, since it uses less digits than its factorization.

20290996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27159 (or 27157 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 20290996 is about 4504.5528079933. The cubic root of 20290996 is about 272.7519024087.

It can be divided in two parts, 2029099 and 6, that added together give a triangular number (2029105 = T₂₀₁₄).

The spelling of 20290996 in words is "twenty million, two hundred ninety thousand, nine hundred ninety-six".