20123544537 has 48 divisors (see below), whose sum is σ = 32404469760. Its totient is φ = 11975410656.

The previous prime is 20123544527. The next prime is 20123544607. The reversal of 20123544537 is 73544532102.

20123544537 is a `hidden beast` number, since 201 + 2 + 3 + 5 + 445 + 3 + 7 = 666.

It is not a de Polignac number, because 20123544537 - 2¹¹ = 20123542489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20123544527) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 225328 + ... + 301694.

It is an arithmetic number, because the mean of its divisors is an integer number (675093120).

Almost surely, 2^20123544537 is an apocalyptic number.

It is an amenable number.

20123544537 is a deficient number, since it is larger than the sum of its proper divisors (12280925223).

20123544537 is a wasteful number, since it uses less digits than its factorization.

20123544537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76482 (or 76479 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 36.

The spelling of 20123544537 in words is "twenty billion, one hundred twenty-three million, five hundred forty-four thousand, five hundred thirty-seven".