21031024050 has 72 divisors (see below), whose sum is σ = 58960047744. Its totient is φ = 5364432480.

The previous prime is 21031024039. The next prime is 21031024103. The reversal of 21031024050 is 5042013012.

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

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1005642 + ... + 1026341.

It is an arithmetic number, because the mean of its divisors is an integer number (818889552).

Almost surely, 2^21031024050 is an apocalyptic number.

21031024050 is an abundant number, since it is smaller than the sum of its proper divisors (37929023694).

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

21031024050 is a wasteful number, since it uses less digits than its factorization.

21031024050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2032024 (or 2032016 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

Adding to 21031024050 its reverse (5042013012), we get a palindrome (26073037062).

The spelling of 21031024050 in words is "twenty-one billion, thirty-one million, twenty-four thousand, fifty".