20453642 has 16 divisors (see below), whose sum is σ = 34624800. Its totient is φ = 8976240.

The previous prime is 20453639. The next prime is 20453663. The reversal of 20453642 is 24635402.

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, 15392 + ... + 16667.

It is an arithmetic number, because the mean of its divisors is an integer number (2164050).

Almost surely, 2^20453642 is an apocalyptic number.

20453642 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20453642 is a deficient number, since it is larger than the sum of its proper divisors (14171158).

20453642 is a wasteful number, since it uses less digits than its factorization.

20453642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32101.

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 20453642 is about 4522.5702869054. The cubic root of 20453642 is about 273.4787272607.

The spelling of 20453642 in words is "twenty million, four hundred fifty-three thousand, six hundred forty-two".