20027904 has 160 divisors (see below), whose sum is σ = 61871040. Its totient is φ = 5701632.

The previous prime is 20027899. The next prime is 20027911. The reversal of 20027904 is 40972002.

It is a super-2 number, since 2×20027904² = 802233877266432, which contains 22 as substring.

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

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, 339427 + ... + 339485.

It is an arithmetic number, because the mean of its divisors is an integer number (386694).

Almost surely, 2^20027904 is an apocalyptic number.

20027904 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20027904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30935520).

20027904 is an abundant number, since it is smaller than the sum of its proper divisors (41843136).

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

20027904 is a wasteful number, since it uses less digits than its factorization.

20027904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110 (or 94 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 20027904 is about 4475.2546296272. The cubic root of 20027904 is about 271.5679415109.

Adding to 20027904 its reverse (40972002), we get a palindrome (60999906).

The spelling of 20027904 in words is "twenty million, twenty-seven thousand, nine hundred four".