21392199413 has 16 divisors (see below), whose sum is σ = 23569082880. Its totient is φ = 19292691456.

The previous prime is 21392199397. The next prime is 21392199457. The reversal of 21392199413 is 31499129312.

It is a cyclic number.

It is not a de Polignac number, because 21392199413 - 2⁴ = 21392199397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21392199463) 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, 322208 + ... + 382886.

It is an arithmetic number, because the mean of its divisors is an integer number (1473067680).

Almost surely, 2^21392199413 is an apocalyptic number.

It is an amenable number.

21392199413 is a deficient number, since it is larger than the sum of its proper divisors (2176883467).

21392199413 is a wasteful number, since it uses less digits than its factorization.

21392199413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61316.

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

The spelling of 21392199413 in words is "twenty-one billion, three hundred ninety-two million, one hundred ninety-nine thousand, four hundred thirteen".