20994402 has 32 divisors (see below), whose sum is σ = 49331520. Its totient is φ = 5872320.

The previous prime is 20994367. The next prime is 20994433. The reversal of 20994402 is 20449902.

It is a self number, because there is not a number n which added to its sum of digits gives 20994402.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11377 + ... + 13092.

It is an arithmetic number, because the mean of its divisors is an integer number (1541610).

Almost surely, 2^20994402 is an apocalyptic number.

20994402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20994402 is an abundant number, since it is smaller than the sum of its proper divisors (28337118).

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

20994402 is a wasteful number, since it uses less digits than its factorization.

20994402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24498.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 20994402 is about 4581.9648623707. The cubic root of 20994402 is about 275.8679004475.

The spelling of 20994402 in words is "twenty million, nine hundred ninety-four thousand, four hundred two".