19950023 has 2 divisors, whose sum is σ = 19950024. Its totient is φ = 19950022.

The previous prime is 19950017. The next prime is 19950041. The reversal of 19950023 is 32005991.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19950023 is a prime.

It is equal to p_1267634 and since 19950023 and 1267634 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19950013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9975011 + 9975012.

It is an arithmetic number, because the mean of its divisors is an integer number (9975012).

Almost surely, 2^19950023 is an apocalyptic number.

19950023 is a deficient number, since it is larger than the sum of its proper divisors (1).

19950023 is an equidigital number, since it uses as much as digits as its factorization.

19950023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2430, while the sum is 29.

The square root of 19950023 is about 4466.5448615233. The cubic root of 19950023 is about 271.2154756544.

The spelling of 19950023 in words is "nineteen million, nine hundred fifty thousand, twenty-three".