19425209087 has 16 divisors (see below), whose sum is σ = 20759213952. Its totient is φ = 18148965120.

The previous prime is 19425209081. The next prime is 19425209101. The reversal of 19425209087 is 78090252491.

It is a cyclic number.

It is not a de Polignac number, because 19425209087 - 2⁴ = 19425209071 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19425209081) 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, 13214 + ... + 197547.

It is an arithmetic number, because the mean of its divisors is an integer number (1297450872).

Almost surely, 2^19425209087 is an apocalyptic number.

19425209087 is a deficient number, since it is larger than the sum of its proper divisors (1334004865).

19425209087 is a wasteful number, since it uses less digits than its factorization.

19425209087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210898.

The product of its (nonzero) digits is 362880, while the sum is 47.

The spelling of 19425209087 in words is "nineteen billion, four hundred twenty-five million, two hundred nine thousand, eighty-seven".