21142203413 has 8 divisors (see below), whose sum is σ = 21885411000. Its totient is φ = 20399940288.

The previous prime is 21142203373. The next prime is 21142203479. The reversal of 21142203413 is 31430224112.

It can be written as a sum of positive squares in 4 ways, for example, as 835383409 + 20306820004 = 28903^2 + 142502^2 .

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 21142203413 - 2³² = 16847236117 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 (21142203713) 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, 190406 + ... + 280247.

It is an arithmetic number, because the mean of its divisors is an integer number (2735676375).

Almost surely, 2^21142203413 is an apocalyptic number.

It is an amenable number.

21142203413 is a deficient number, since it is larger than the sum of its proper divisors (743207587).

21142203413 is a wasteful number, since it uses less digits than its factorization.

21142203413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472231.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21142203413 its reverse (31430224112), we get a palindrome (52572427525).

The spelling of 21142203413 in words is "twenty-one billion, one hundred forty-two million, two hundred three thousand, four hundred thirteen".