20155020250 has 16 divisors (see below), whose sum is σ = 37730198376. Its totient is φ = 8062008000.

The previous prime is 20155020217. The next prime is 20155020283. The reversal of 20155020250 is 5202055102.

It is an interprime number because it is at equal distance from previous prime (20155020217) and next prime (20155020283).

It can be written as a sum of positive squares in 4 ways, for example, as 939238609 + 19215781641 = 30647^2 + 138621^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40309791 + ... + 40310290.

Almost surely, 2^20155020250 is an apocalyptic number.

20155020250 is a deficient number, since it is larger than the sum of its proper divisors (17575178126).

20155020250 is an equidigital number, since it uses as much as digits as its factorization.

20155020250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80620098 (or 80620088 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 22.

Adding to 20155020250 its reverse (5202055102), we get a palindrome (25357075352).

The spelling of 20155020250 in words is "twenty billion, one hundred fifty-five million, twenty thousand, two hundred fifty".