19212939 has 12 divisors (see below), whose sum is σ = 27860976. Its totient is φ = 12758352.

The previous prime is 19212931. The next prime is 19212961. The reversal of 19212939 is 93921291.

It is a happy number.

It is not a de Polignac number, because 19212939 - 2³ = 19212931 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19212931) 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 11 ways as a sum of consecutive naturals, for example, 1692 + ... + 6425.

It is an arithmetic number, because the mean of its divisors is an integer number (2321748).

Almost surely, 2^19212939 is an apocalyptic number.

19212939 is a deficient number, since it is larger than the sum of its proper divisors (8648037).

19212939 is a wasteful number, since it uses less digits than its factorization.

19212939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8386 (or 8383 counting only the distinct ones).

The product of its digits is 8748, while the sum is 36.

The square root of 19212939 is about 4383.2566659962. The cubic root of 19212939 is about 267.8333178657.

It can be divided in two parts, 192 and 12939, that added together give a palindrome (13131).

The spelling of 19212939 in words is "nineteen million, two hundred twelve thousand, nine hundred thirty-nine".