20713104 has 40 divisors (see below), whose sum is σ = 59455520. Its totient is φ = 6904224.

The previous prime is 20713103. The next prime is 20713109. The reversal of 20713104 is 40131702.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20713103) 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, 23542 + ... + 24405.

It is an arithmetic number, because the mean of its divisors is an integer number (1486388).

Almost surely, 2^20713104 is an apocalyptic number.

20713104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20713104 is an abundant number, since it is smaller than the sum of its proper divisors (38742416).

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

20713104 is a wasteful number, since it uses less digits than its factorization.

20713104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47964 (or 47952 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 20713104 is about 4551.1651255475. The cubic root of 20713104 is about 274.6302645487.

Adding to 20713104 its reverse (40131702), we get a palindrome (60844806).

The spelling of 20713104 in words is "twenty million, seven hundred thirteen thousand, one hundred four".