21033422025 has 96 divisors (see below), whose sum is σ = 43433791488. Its totient is φ = 8725516800.

The previous prime is 21033421979. The next prime is 21033422041. The reversal of 21033422025 is 52022433012.

It is not a de Polignac number, because 21033422025 - 2¹⁰ = 21033421001 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21033421986 and 21033422004.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3560224 + ... + 3566126.

It is an arithmetic number, because the mean of its divisors is an integer number (452435328).

Almost surely, 2^21033422025 is an apocalyptic number.

21033422025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21033422025 is an abundant number, since it is smaller than the sum of its proper divisors (22400369463).

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

21033422025 is a wasteful number, since it uses less digits than its factorization.

21033422025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6551 (or 6546 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

Adding to 21033422025 its reverse (52022433012), we get a palindrome (73055855037).

The spelling of 21033422025 in words is "twenty-one billion, thirty-three million, four hundred twenty-two thousand, twenty-five".