19214900639 has 16 divisors (see below), whose sum is σ = 21061192320. Its totient is φ = 17385300000.

The previous prime is 19214900611. The next prime is 19214900651. The reversal of 19214900639 is 93600941291.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 19214900639 - 2¹² = 19214896543 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19214900639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19214900669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7008809 + ... + 7011549.

It is an arithmetic number, because the mean of its divisors is an integer number (1316324520).

Almost surely, 2^19214900639 is an apocalyptic number.

19214900639 is a deficient number, since it is larger than the sum of its proper divisors (1846291681).

19214900639 is a wasteful number, since it uses less digits than its factorization.

19214900639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5542.

The product of its (nonzero) digits is 104976, while the sum is 44.

The spelling of 19214900639 in words is "nineteen billion, two hundred fourteen million, nine hundred thousand, six hundred thirty-nine".