21033115054 has 48 divisors (see below), whose sum is σ = 39120764400. Its totient is φ = 8426906880.

The previous prime is 21033115043. The next prime is 21033115057. The reversal of 21033115054 is 45051133012.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21033115057) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 205869 + ... + 290599.

It is an arithmetic number, because the mean of its divisors is an integer number (815015925).

Almost surely, 2^21033115054 is an apocalyptic number.

21033115054 is a deficient number, since it is larger than the sum of its proper divisors (18087649346).

21033115054 is a wasteful number, since it uses less digits than its factorization.

21033115054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84913 (or 84906 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

Adding to 21033115054 its reverse (45051133012), we get a palindrome (66084248066).

The spelling of 21033115054 in words is "twenty-one billion, thirty-three million, one hundred fifteen thousand, fifty-four".