20525543427 has 16 divisors (see below), whose sum is σ = 27521921408. Its totient is φ = 13606548480.

The previous prime is 20525543407. The next prime is 20525543447. The reversal of 20525543427 is 72434552502.

It is an interprime number because it is at equal distance from previous prime (20525543407) and next prime (20525543447).

It is not a de Polignac number, because 20525543427 - 2¹⁰ = 20525542403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20525543407) 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, 715788 + ... + 743910.

It is an arithmetic number, because the mean of its divisors is an integer number (1720120088).

Almost surely, 2^20525543427 is an apocalyptic number.

20525543427 is a deficient number, since it is larger than the sum of its proper divisors (6996377981).

20525543427 is a wasteful number, since it uses less digits than its factorization.

20525543427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29490.

The product of its (nonzero) digits is 336000, while the sum is 39.

The spelling of 20525543427 in words is "twenty billion, five hundred twenty-five million, five hundred forty-three thousand, four hundred twenty-seven".