21113002040 has 64 divisors (see below), whose sum is σ = 51484476960. Its totient is φ = 7745886720.

The previous prime is 21113001991. The next prime is 21113002091. The reversal of 21113002040 is 4020031112.

It is a congruent number.

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, 47666 + ... + 210945.

Almost surely, 2^21113002040 is an apocalyptic number.

21113002040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21113002040 is an abundant number, since it is smaller than the sum of its proper divisors (30371474920).

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

21113002040 is a wasteful number, since it uses less digits than its factorization.

21113002040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258792 (or 258788 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21113002040 its reverse (4020031112), we get a palindrome (25133033152).

The spelling of 21113002040 in words is "twenty-one billion, one hundred thirteen million, two thousand, forty".