21230074613 has 8 divisors (see below), whose sum is σ = 23166492960. Its totient is φ = 19294724880.

The previous prime is 21230074609. The next prime is 21230074667. The reversal of 21230074613 is 31647003212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21230074613 - 2² = 21230074609 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 (21230034613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225323 + ... + 305336.

It is an arithmetic number, because the mean of its divisors is an integer number (2895811620).

Almost surely, 2^21230074613 is an apocalyptic number.

It is an amenable number.

21230074613 is a deficient number, since it is larger than the sum of its proper divisors (1936418347).

21230074613 is a wasteful number, since it uses less digits than its factorization.

21230074613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534307.

The product of its (nonzero) digits is 6048, while the sum is 29.

Adding to 21230074613 its reverse (31647003212), we get a palindrome (52877077825).

The spelling of 21230074613 in words is "twenty-one billion, two hundred thirty million, seventy-four thousand, six hundred thirteen".