21192343299 has 24 divisors (see below), whose sum is σ = 31334400240. Its totient is φ = 13794665472.

The previous prime is 21192343283. The next prime is 21192343321. The reversal of 21192343299 is 99234329112.

It is a happy number.

21192343299 is a `hidden beast` number, since 2 + 1 + 19 + 2 + 343 + 299 = 666.

It is not a de Polignac number, because 21192343299 - 2⁴ = 21192343283 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21192343229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1273867 + ... + 1290395.

It is an arithmetic number, because the mean of its divisors is an integer number (1305600010).

Almost surely, 2^21192343299 is an apocalyptic number.

21192343299 is a deficient number, since it is larger than the sum of its proper divisors (10142056941).

21192343299 is a wasteful number, since it uses less digits than its factorization.

21192343299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19891 (or 19888 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The spelling of 21192343299 in words is "twenty-one billion, one hundred ninety-two million, three hundred forty-three thousand, two hundred ninety-nine".