202134426987 has 18 divisors (see below), whose sum is σ = 286317570868. Its totient is φ = 126821138048.

The previous prime is 202134426971. The next prime is 202134427009. The reversal of 202134426987 is 789624431202.

It is not a de Polignac number, because 202134426987 - 2⁴ = 202134426971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202134426917) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 13230589 + ... + 13245857.

Almost surely, 2^202134426987 is an apocalyptic number.

202134426987 is a deficient number, since it is larger than the sum of its proper divisors (84183143881).

202134426987 is an frugal number, since it uses more digits than its factorization.

202134426987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30575 (or 15289 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 48.

Multiplying 202134426987 by its sum of digits (48), we get a square (9702452495376 = 3114876²).

The spelling of 202134426987 in words is "two hundred two billion, one hundred thirty-four million, four hundred twenty-six thousand, nine hundred eighty-seven".