20542231125 has 64 divisors (see below), whose sum is σ = 40901952000. Its totient is φ = 10113076800.

The previous prime is 20542231123. The next prime is 20542231139. The reversal of 20542231125 is 52113224502.

20542231125 is a `hidden beast` number, since 2 + 0 + 542 + 2 + 3 + 112 + 5 = 666.

It is not a de Polignac number, because 20542231125 - 2¹ = 20542231123 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20542231123) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 190225 + ... + 277974.

It is an arithmetic number, because the mean of its divisors is an integer number (639093000).

Almost surely, 2^20542231125 is an apocalyptic number.

20542231125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20542231125 is a deficient number, since it is larger than the sum of its proper divisors (20359720875).

20542231125 is a wasteful number, since it uses less digits than its factorization.

20542231125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468236 (or 468220 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 20542231125 its reverse (52113224502), we get a palindrome (72655455627).

The spelling of 20542231125 in words is "twenty billion, five hundred forty-two million, two hundred thirty-one thousand, one hundred twenty-five".