19930055 has 16 divisors (see below), whose sum is σ = 25049088. Its totient is φ = 15204000.

The previous prime is 19930033. The next prime is 19930061. The reversal of 19930055 is 55003991.

It is not a de Polignac number, because 19930055 - 2⁶ = 19929991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10100 + ... + 11910.

It is an arithmetic number, because the mean of its divisors is an integer number (1565568).

Almost surely, 2^19930055 is an apocalyptic number.

19930055 is a deficient number, since it is larger than the sum of its proper divisors (5119033).

19930055 is a wasteful number, since it uses less digits than its factorization.

19930055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1918.

The product of its (nonzero) digits is 6075, while the sum is 32.

The square root of 19930055 is about 4464.3090170820. The cubic root of 19930055 is about 271.1249588254.

The spelling of 19930055 in words is "nineteen million, nine hundred thirty thousand, fifty-five".