20803442 has 32 divisors (see below), whose sum is σ = 36175680. Its totient is φ = 8873280.

The previous prime is 20803417. The next prime is 20803487. The reversal of 20803442 is 24430802.

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, 65468 + ... + 65784.

It is an arithmetic number, because the mean of its divisors is an integer number (1130490).

Almost surely, 2^20803442 is an apocalyptic number.

20803442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20803442 is a deficient number, since it is larger than the sum of its proper divisors (15372238).

20803442 is a wasteful number, since it uses less digits than its factorization.

20803442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 20803442 is about 4561.0790389994. The cubic root of 20803442 is about 275.0289424084.

The spelling of 20803442 in words is "twenty million, eight hundred three thousand, four hundred forty-two".