20145355025 has 24 divisors (see below), whose sum is σ = 25683177600. Its totient is φ = 15667386560.

The previous prime is 20145355007. The next prime is 20145355031. The reversal of 20145355025 is 52055354102.

It is not a de Polignac number, because 20145355025 - 2¹⁸ = 20145092881 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20145354982 and 20145355000.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 117542 + ... + 232608.

It is an arithmetic number, because the mean of its divisors is an integer number (1070132400).

Almost surely, 2^20145355025 is an apocalyptic number.

20145355025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20145355025 is a deficient number, since it is larger than the sum of its proper divisors (5537822575).

20145355025 is a wasteful number, since it uses less digits than its factorization.

20145355025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115273 (or 115268 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 32.

The spelling of 20145355025 in words is "twenty billion, one hundred forty-five million, three hundred fifty-five thousand, twenty-five".