20645024025 has 12 divisors (see below), whose sum is σ = 34133106512. Its totient is φ = 11010679440.

The previous prime is 20645024017. The next prime is 20645024033. The reversal of 20645024025 is 52042054602.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20645024017) and next prime (20645024033).

It is not a de Polignac number, because 20645024025 - 2³ = 20645024017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20645023983 and 20645024001.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 137633419 + ... + 137633568.

Almost surely, 2^20645024025 is an apocalyptic number.

20645024025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20645024025 is a deficient number, since it is larger than the sum of its proper divisors (13488082487).

20645024025 is a wasteful number, since it uses less digits than its factorization.

20645024025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275267000 (or 275266995 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

Adding to 20645024025 its reverse (52042054602), we get a palindrome (72687078627).

The spelling of 20645024025 in words is "twenty billion, six hundred forty-five million, twenty-four thousand, twenty-five".