20102265025 has 6 divisors (see below), whose sum is σ = 24926808662. Its totient is φ = 16081812000.

The previous prime is 20102265023. The next prime is 20102265047. The reversal of 20102265025 is 52056220102.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 2212667521 + 17889597504 = 47039^2 + 133752^2 .

It is not a de Polignac number, because 20102265025 - 2¹ = 20102265023 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 804090601 = 20102265025 / (2 + 0 + 1 + 0 + 2 + 2 + 6 + 5 + 0 + 2 + 5).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20102265023) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 402045276 + ... + 402045325.

Almost surely, 2^20102265025 is an apocalyptic number.

20102265025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20102265025 is a deficient number, since it is larger than the sum of its proper divisors (4824543637).

20102265025 is an equidigital number, since it uses as much as digits as its factorization.

20102265025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804090611 (or 804090606 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 20102265025 its reverse (52056220102), we get a palindrome (72158485127).

The spelling of 20102265025 in words is "twenty billion, one hundred two million, two hundred sixty-five thousand, twenty-five".