19985901013 has 8 divisors (see below), whose sum is σ = 22656082400. Its totient is φ = 17477548848.

The previous prime is 19985901007. The next prime is 19985901101. The reversal of 19985901013 is 31010958991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 19985901013 - 2¹⁷ = 19985769941 is a prime.

It is the 141372-nd Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19985904013) by changing a digit.

It is a nontrivial repunit in base 141371.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40457043 + ... + 40457536.

It is an arithmetic number, because the mean of its divisors is an integer number (2832010300).

Almost surely, 2^19985901013 is an apocalyptic number.

19985901013 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

19985901013 is a deficient number, since it is larger than the sum of its proper divisors (2670181387).

19985901013 is a wasteful number, since it uses less digits than its factorization.

19985901013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80914611.

The product of its (nonzero) digits is 87480, while the sum is 46.

The spelling of 19985901013 in words is "nineteen billion, nine hundred eighty-five million, nine hundred one thousand, thirteen".