21034033025 has 24 divisors (see below), whose sum is σ = 27244250304. Its totient is φ = 16079025600.

The previous prime is 21034033019. The next prime is 21034033061. The reversal of 21034033025 is 52033043012.

It is not a de Polignac number, because 21034033025 - 2⁸ = 21034032769 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 554930 + ... + 591620.

It is an arithmetic number, because the mean of its divisors is an integer number (1135177096).

Almost surely, 2^21034033025 is an apocalyptic number.

21034033025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21034033025 is a deficient number, since it is larger than the sum of its proper divisors (6210217279).

21034033025 is a wasteful number, since it uses less digits than its factorization.

21034033025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37721 (or 37716 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 23.

Adding to 21034033025 its reverse (52033043012), we get a palindrome (73067076037).

The spelling of 21034033025 in words is "twenty-one billion, thirty-four million, thirty-three thousand, twenty-five".