20845104 has 40 divisors (see below), whose sum is σ = 61543680. Its totient is φ = 5955648.

The previous prime is 20845091. The next prime is 20845129. The reversal of 20845104 is 40154802.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

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, 30684 + ... + 31355.

It is an arithmetic number, because the mean of its divisors is an integer number (1538592).

Almost surely, 2^20845104 is an apocalyptic number.

20845104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20845104 is an abundant number, since it is smaller than the sum of its proper divisors (40698576).

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

20845104 is a wasteful number, since it uses less digits than its factorization.

20845104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62057 (or 62051 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 20845104 is about 4565.6438757310. The cubic root of 20845104 is about 275.2124154981.

Adding to 20845104 its reverse (40154802), we get a palindrome (60999906).

The spelling of 20845104 in words is "twenty million, eight hundred forty-five thousand, one hundred four".