19220139 has 16 divisors (see below), whose sum is σ = 28631040. Its totient is φ = 12742920.

The previous prime is 19220129. The next prime is 19220161. The reversal of 19220139 is 93102291.

It is not a de Polignac number, because 19220139 - 2⁸ = 19219883 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19220129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3294 + ... + 7020.

It is an arithmetic number, because the mean of its divisors is an integer number (1789440).

Almost surely, 2^19220139 is an apocalyptic number.

19220139 is a deficient number, since it is larger than the sum of its proper divisors (9410901).

19220139 is a wasteful number, since it uses less digits than its factorization.

19220139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3927 (or 3921 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 19220139 is about 4384.0778962058. The cubic root of 19220139 is about 267.8667703054.

The spelling of 19220139 in words is "nineteen million, two hundred twenty thousand, one hundred thirty-nine".