19047638020 has 12 divisors (see below), whose sum is σ = 40000039884. Its totient is φ = 7619055200.

The previous prime is 19047638003. The next prime is 19047638023. The reversal of 19047638020 is 2083674091.

It can be written as a sum of positive squares in 2 ways, for example, as 2843875584 + 16203762436 = 53328^2 + 127294^2 .

It is not an unprimeable number, because it can be changed into a prime (19047638023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 476190931 + ... + 476190970.

It is an arithmetic number, because the mean of its divisors is an integer number (3333336657).

Almost surely, 2^19047638020 is an apocalyptic number.

19047638020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19047638020 is an abundant number, since it is smaller than the sum of its proper divisors (20952401864).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19047638020 is a wasteful number, since it uses less digits than its factorization.

19047638020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 952381910 (or 952381908 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 40.

The spelling of 19047638020 in words is "nineteen billion, forty-seven million, six hundred thirty-eight thousand, twenty".