21113003104 has 24 divisors (see below), whose sum is σ = 42450615648. Its totient is φ = 10331894400.

The previous prime is 21113003101. The next prime is 21113003141. The reversal of 21113003104 is 40130031112.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21113003101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7017447 + ... + 7020454.

It is an arithmetic number, because the mean of its divisors is an integer number (1768775652).

Almost surely, 2^21113003104 is an apocalyptic number.

It is an amenable number.

21113003104 is an abundant number, since it is smaller than the sum of its proper divisors (21337612544).

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

21113003104 is a wasteful number, since it uses less digits than its factorization.

21113003104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14037958 (or 14037950 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21113003104 its reverse (40130031112), we get a palindrome (61243034216).

The spelling of 21113003104 in words is "twenty-one billion, one hundred thirteen million, three thousand, one hundred four".