19855406914 has 48 divisors (see below), whose sum is σ = 35302115520. Its totient is φ = 8348931360.

The previous prime is 19855406899. The next prime is 19855406929. The reversal of 19855406914 is 41960455891.

It is an interprime number because it is at equal distance from previous prime (19855406899) and next prime (19855406929).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2500819 + ... + 2508745.

It is an arithmetic number, because the mean of its divisors is an integer number (735460740).

Almost surely, 2^19855406914 is an apocalyptic number.

19855406914 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

19855406914 is a deficient number, since it is larger than the sum of its proper divisors (15446708606).

19855406914 is a wasteful number, since it uses less digits than its factorization.

19855406914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8423 (or 8416 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 52.

The spelling of 19855406914 in words is "nineteen billion, eight hundred fifty-five million, four hundred six thousand, nine hundred fourteen".