20642594 has 16 divisors (see below), whose sum is σ = 35521728. Its totient is φ = 8813232.

The previous prime is 20642593. The next prime is 20642597. The reversal of 20642594 is 49524602.

It is a super-2 number, since 2×20642594² = 852233374097672, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20642594.

It is not an unprimeable number, because it can be changed into a prime (20642591) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1217 + ... + 6539.

It is an arithmetic number, because the mean of its divisors is an integer number (2220108).

Almost surely, 2^20642594 is an apocalyptic number.

20642594 is a deficient number, since it is larger than the sum of its proper divisors (14879134).

20642594 is a wasteful number, since it uses less digits than its factorization.

20642594 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5609.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 20642594 is about 4543.4121538773. The cubic root of 20642594 is about 274.3182850035.

The spelling of 20642594 in words is "twenty million, six hundred forty-two thousand, five hundred ninety-four".