20363134987 has 12 divisors (see below), whose sum is σ = 22054054680. Its totient is φ = 18793302528.

The previous prime is 20363134969. The next prime is 20363134991. The reversal of 20363134987 is 78943136302.

It is not a de Polignac number, because 20363134987 - 2¹⁹ = 20362610699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20363132987) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1695339 + ... + 1707307.

It is an arithmetic number, because the mean of its divisors is an integer number (1837837890).

Almost surely, 2^20363134987 is an apocalyptic number.

20363134987 is a deficient number, since it is larger than the sum of its proper divisors (1690919693).

20363134987 is a wasteful number, since it uses less digits than its factorization.

20363134987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22062 (or 22049 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 46.

The spelling of 20363134987 in words is "twenty billion, three hundred sixty-three million, one hundred thirty-four thousand, nine hundred eighty-seven".