21413343401 has 4 divisors (see below), whose sum is σ = 21625356804. Its totient is φ = 21201330000.

The previous prime is 21413343373. The next prime is 21413343431. The reversal of 21413343401 is 10434331412.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9584605801 + 11828737600 = 97901^2 + 108760^2 .

It is a cyclic number.

It is not a de Polignac number, because 21413343401 - 2⁶ = 21413343337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21413343431) 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, 106006550 + ... + 106006751.

It is an arithmetic number, because the mean of its divisors is an integer number (5406339201).

Almost surely, 2^21413343401 is an apocalyptic number.

It is an amenable number.

21413343401 is a deficient number, since it is larger than the sum of its proper divisors (212013403).

21413343401 is a wasteful number, since it uses less digits than its factorization.

21413343401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212013402.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 21413343401 its reverse (10434331412), we get a palindrome (31847674813).

The spelling of 21413343401 in words is "twenty-one billion, four hundred thirteen million, three hundred forty-three thousand, four hundred one".