19902871043 has 16 divisors (see below), whose sum is σ = 21905510400. Its totient is φ = 17932992000.

The previous prime is 19902871031. The next prime is 19902871061. The reversal of 19902871043 is 34017820991.

It is not a de Polignac number, because 19902871043 - 2⁶ = 19902870979 is a prime.

It is a super-2 number, since 2×19902871043² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19902870985 and 19902871003.

It is not an unprimeable number, because it can be changed into a prime (19902879043) 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, 732446 + ... + 759132.

It is an arithmetic number, because the mean of its divisors is an integer number (1369094400).

Almost surely, 2^19902871043 is an apocalyptic number.

19902871043 is a deficient number, since it is larger than the sum of its proper divisors (2002639357).

19902871043 is a wasteful number, since it uses less digits than its factorization.

19902871043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27298.

The product of its (nonzero) digits is 108864, while the sum is 44.

The spelling of 19902871043 in words is "nineteen billion, nine hundred two million, eight hundred seventy-one thousand, forty-three".