21436407113 has 4 divisors (see below), whose sum is σ = 23385171408. Its totient is φ = 19487642820.

The previous prime is 21436407103. The next prime is 21436407119. The reversal of 21436407113 is 31170463412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21436407113 - 2¹² = 21436403017 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 21436407113.

It is not an unprimeable number, because it can be changed into a prime (21436407119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 974382131 + ... + 974382152.

It is an arithmetic number, because the mean of its divisors is an integer number (5846292852).

Almost surely, 2^21436407113 is an apocalyptic number.

It is an amenable number.

21436407113 is a deficient number, since it is larger than the sum of its proper divisors (1948764295).

21436407113 is a wasteful number, since it uses less digits than its factorization.

21436407113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1948764294.

The product of its (nonzero) digits is 12096, while the sum is 32.

The spelling of 21436407113 in words is "twenty-one billion, four hundred thirty-six million, four hundred seven thousand, one hundred thirteen".