19408738087 has 2 divisors, whose sum is σ = 19408738088. Its totient is φ = 19408738086.

The previous prime is 19408738081. The next prime is 19408738183. The reversal of 19408738087 is 78083780491.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19408738087 - 2³ = 19408738079 is a prime.

It is a super-3 number, since 3×19408738087³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19408738081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9704369043 + 9704369044.

It is an arithmetic number, because the mean of its divisors is an integer number (9704369044).

Almost surely, 2^19408738087 is an apocalyptic number.

19408738087 is a deficient number, since it is larger than the sum of its proper divisors (1).

19408738087 is an equidigital number, since it uses as much as digits as its factorization.

19408738087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2709504, while the sum is 55.

The spelling of 19408738087 in words is "nineteen billion, four hundred eight million, seven hundred thirty-eight thousand, eighty-seven".