20218154525 has 24 divisors (see below), whose sum is σ = 25204306464. Its totient is φ = 16088446400.

The previous prime is 20218154503. The next prime is 20218154527. The reversal of 20218154525 is 52545181202.

It is not a de Polignac number, because 20218154525 - 2⁸ = 20218154269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20218154527) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3840395 + ... + 3845655.

It is an arithmetic number, because the mean of its divisors is an integer number (1050179436).

Almost surely, 2^20218154525 is an apocalyptic number.

20218154525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20218154525 is a deficient number, since it is larger than the sum of its proper divisors (4986151939).

20218154525 is a wasteful number, since it uses less digits than its factorization.

20218154525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6061 (or 6056 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 35.

The spelling of 20218154525 in words is "twenty billion, two hundred eighteen million, one hundred fifty-four thousand, five hundred twenty-five".