20542531412 has 12 divisors (see below), whose sum is σ = 38714770836. Its totient is φ = 9481168320.

The previous prime is 20542531409. The next prime is 20542531423. The reversal of 20542531412 is 21413524502.

It can be written as a sum of positive squares in 2 ways, for example, as 4513958596 + 16028572816 = 67186^2 + 126604^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197524289 + ... + 197524392.

It is an arithmetic number, because the mean of its divisors is an integer number (3226230903).

Almost surely, 2^20542531412 is an apocalyptic number.

It is an amenable number.

20542531412 is a deficient number, since it is larger than the sum of its proper divisors (18172239424).

20542531412 is a wasteful number, since it uses less digits than its factorization.

20542531412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395048698 (or 395048696 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

The spelling of 20542531412 in words is "twenty billion, five hundred forty-two million, five hundred thirty-one thousand, four hundred twelve".