19955023 has 8 divisors (see below), whose sum is σ = 21802320. Its totient is φ = 18113280.

The previous prime is 19954981. The next prime is 19955029. The reversal of 19955023 is 32055991.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19955023 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19955023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19955029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10911 + ... + 12607.

It is an arithmetic number, because the mean of its divisors is an integer number (2725290).

Almost surely, 2^19955023 is an apocalyptic number.

19955023 is a deficient number, since it is larger than the sum of its proper divisors (1847297).

19955023 is a wasteful number, since it uses less digits than its factorization.

19955023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2777.

The product of its (nonzero) digits is 12150, while the sum is 34.

The square root of 19955023 is about 4467.1045432136. The cubic root of 19955023 is about 271.2381316701.

The spelling of 19955023 in words is "nineteen million, nine hundred fifty-five thousand, twenty-three".