20450052025 has 18 divisors (see below), whose sum is σ = 27458738250. Its totient is φ = 15101573760.

The previous prime is 20450052023. The next prime is 20450052071. The reversal of 20450052025 is 52025005402.

It is a happy number.

It can be written as a sum of positive squares in 9 ways, for example, as 17199797904 + 3250254121 = 131148^2 + 57011^2 .

It is not a de Polignac number, because 20450052025 - 2¹ = 20450052023 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (20450052023) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2415900 + ... + 2424349.

Almost surely, 2^20450052025 is an apocalyptic number.

20450052025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20450052025 is a deficient number, since it is larger than the sum of its proper divisors (7008686225).

20450052025 is a wasteful number, since it uses less digits than its factorization.

20450052025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4840285 (or 4840267 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 25.

Adding to 20450052025 its reverse (52025005402), we get a palindrome (72475057427).

The spelling of 20450052025 in words is "twenty billion, four hundred fifty million, fifty-two thousand, twenty-five".