21010423413 has 8 divisors (see below), whose sum is σ = 32015883328. Its totient is φ = 12005956224.

The previous prime is 21010423409. The next prime is 21010423417. The reversal of 21010423413 is 31432401012.

It is an interprime number because it is at equal distance from previous prime (21010423409) and next prime (21010423417).

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

It is not a de Polignac number, because 21010423413 - 2² = 21010423409 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 1000496353 = 21010423413 / (2 + 1 + 0 + 1 + 0 + 4 + 2 + 3 + 4 + 1 + 3).

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 21010423413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010423417) 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, 500248156 + ... + 500248197.

It is an arithmetic number, because the mean of its divisors is an integer number (4001985416).

Almost surely, 2^21010423413 is an apocalyptic number.

It is an amenable number.

21010423413 is a deficient number, since it is larger than the sum of its proper divisors (11005459915).

21010423413 is a wasteful number, since it uses less digits than its factorization.

21010423413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000496363.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21010423413 its reverse (31432401012), we get a palindrome (52442824425).

The spelling of 21010423413 in words is "twenty-one billion, ten million, four hundred twenty-three thousand, four hundred thirteen".