20613642 has 32 divisors (see below), whose sum is σ = 47405952. Its totient is φ = 5853504.

The previous prime is 20613601. The next prime is 20613647. The reversal of 20613642 is 24631602.

It is not an unprimeable number, because it can be changed into a prime (20613647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5848 + ... + 8684.

It is an arithmetic number, because the mean of its divisors is an integer number (1481436).

Almost surely, 2^20613642 is an apocalyptic number.

20613642 is an abundant number, since it is smaller than the sum of its proper divisors (26792310).

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

20613642 is a wasteful number, since it uses less digits than its factorization.

20613642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3022.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 20613642 is about 4540.2248842981. The cubic root of 20613642 is about 274.1899778263.

The spelling of 20613642 in words is "twenty million, six hundred thirteen thousand, six hundred forty-two".