20155055025 has 48 divisors (see below), whose sum is σ = 38111560704. Its totient is φ = 9206940480.

The previous prime is 20155055009. The next prime is 20155055027. The reversal of 20155055025 is 52055055102.

It is not a de Polignac number, because 20155055025 - 2⁴ = 20155055009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20155054983 and 20155055001.

It is not an unprimeable number, because it can be changed into a prime (20155055027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 735724 + ... + 762626.

It is an arithmetic number, because the mean of its divisors is an integer number (793990848).

Almost surely, 2^20155055025 is an apocalyptic number.

20155055025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20155055025 is a deficient number, since it is larger than the sum of its proper divisors (17956505679).

20155055025 is a wasteful number, since it uses less digits than its factorization.

20155055025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28350 (or 28345 counting only the distinct ones).

The product of its (nonzero) digits is 12500, while the sum is 30.

The spelling of 20155055025 in words is "twenty billion, one hundred fifty-five million, fifty-five thousand, twenty-five".