19870747305 has 32 divisors (see below), whose sum is σ = 33517580544. Its totient is φ = 10032439296.

The previous prime is 19870747283. The next prime is 19870747321. The reversal of 19870747305 is 50374707891.

It is not a de Polignac number, because 19870747305 - 2¹⁰ = 19870746281 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 263424 + ... + 330353.

It is an arithmetic number, because the mean of its divisors is an integer number (1047424392).

Almost surely, 2^19870747305 is an apocalyptic number.

19870747305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19870747305 is a deficient number, since it is larger than the sum of its proper divisors (13646833239).

19870747305 is a wasteful number, since it uses less digits than its factorization.

19870747305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593905.

The product of its (nonzero) digits is 1481760, while the sum is 51.

The spelling of 19870747305 in words is "nineteen billion, eight hundred seventy million, seven hundred forty-seven thousand, three hundred five".