20822638 has 32 divisors (see below), whose sum is σ = 34364160. Its totient is φ = 9434880.

The previous prime is 20822591. The next prime is 20822647. The reversal of 20822638 is 83622802.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

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, 66370 + ... + 66682.

It is an arithmetic number, because the mean of its divisors is an integer number (1073880).

Almost surely, 2^20822638 is an apocalyptic number.

20822638 is a deficient number, since it is larger than the sum of its proper divisors (13541522).

20822638 is a wasteful number, since it uses less digits than its factorization.

20822638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 20822638 is about 4563.1828804027. The cubic root of 20822638 is about 275.1135090644.

The spelling of 20822638 in words is "twenty million, eight hundred twenty-two thousand, six hundred thirty-eight".