20154566125 has 16 divisors (see below), whose sum is σ = 25157620800. Its totient is φ = 16120626000.

The previous prime is 20154566057. The next prime is 20154566129. The reversal of 20154566125 is 52166545102.

It is not a de Polignac number, because 20154566125 - 2¹¹ = 20154564077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20154566129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 850690 + ... + 874060.

It is an arithmetic number, because the mean of its divisors is an integer number (1572351300).

Almost surely, 2^20154566125 is an apocalyptic number.

20154566125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20154566125 is a deficient number, since it is larger than the sum of its proper divisors (5003054675).

20154566125 is an equidigital number, since it uses as much as digits as its factorization.

20154566125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30285 (or 30275 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 37.

The spelling of 20154566125 in words is "twenty billion, one hundred fifty-four million, five hundred sixty-six thousand, one hundred twenty-five".