19930051 has 4 divisors (see below), whose sum is σ = 20057152. Its totient is φ = 19802952.

The previous prime is 19930033. The next prime is 19930061. The reversal of 19930051 is 15003991.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19930051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19930061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63315 + ... + 63628.

It is an arithmetic number, because the mean of its divisors is an integer number (5014288).

Almost surely, 2^19930051 is an apocalyptic number.

19930051 is a deficient number, since it is larger than the sum of its proper divisors (127101).

19930051 is a wasteful number, since it uses less digits than its factorization.

19930051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127100.

The product of its (nonzero) digits is 1215, while the sum is 28.

The square root of 19930051 is about 4464.3085690844. The cubic root of 19930051 is about 271.1249406870.

It can be divided in two parts, 1993005 and 1, that added together give a triangular number (1993006 = T₁₉₉₆).

The spelling of 19930051 in words is "nineteen million, nine hundred thirty thousand, fifty-one".