20253442 has 16 divisors (see below), whose sum is σ = 33439392. Its totient is φ = 9123520.

The previous prime is 20253439. The next prime is 20253451. The reversal of 20253442 is 24435202.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1588 + ... + 6559.

It is an arithmetic number, because the mean of its divisors is an integer number (2089962).

Almost surely, 2^20253442 is an apocalyptic number.

20253442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20253442 is a deficient number, since it is larger than the sum of its proper divisors (13185950).

20253442 is a wasteful number, since it uses less digits than its factorization.

20253442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8273.

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 20253442 is about 4500.3824281943. The cubic root of 20253442 is about 272.5835313316.

Adding to 20253442 its reverse (24435202), we get a palindrome (44688644).

The spelling of 20253442 in words is "twenty million, two hundred fifty-three thousand, four hundred forty-two".