20855494 has 16 divisors (see below), whose sum is σ = 35050896. Its totient is φ = 9223200.

The previous prime is 20855491. The next prime is 20855501. The reversal of 20855494 is 49455802.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20855491) 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, 11997 + ... + 13624.

It is an arithmetic number, because the mean of its divisors is an integer number (2190681).

Almost surely, 2^20855494 is an apocalyptic number.

20855494 is a deficient number, since it is larger than the sum of its proper divisors (14195402).

20855494 is a wasteful number, since it uses less digits than its factorization.

20855494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25671.

The product of its (nonzero) digits is 57600, while the sum is 37.

The square root of 20855494 is about 4566.7815800627. The cubic root of 20855494 is about 275.2581333805.

The spelling of 20855494 in words is "twenty million, eight hundred fifty-five thousand, four hundred ninety-four".