21242643035626 has 16 divisors (see below), whose sum is σ = 33812902699200. Its totient is φ = 9987329591008.

The previous prime is 21242643035591. The next prime is 21242643035659. The reversal of 21242643035626 is 62653034624212.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3913527691 + ... + 3913533118.

It is an arithmetic number, because the mean of its divisors is an integer number (2113306418700).

Almost surely, 2^{21242643035626} is an apocalyptic number.

21242643035626 is a deficient number, since it is larger than the sum of its proper divisors (12570259663574).

21242643035626 is a wasteful number, since it uses less digits than its factorization.

21242643035626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7827060893.

The product of its (nonzero) digits is 2488320, while the sum is 46.

Adding to 21242643035626 its reverse (62653034624212), we get a palindrome (83895677659838).

The spelling of 21242643035626 in words is "twenty-one trillion, two hundred forty-two billion, six hundred forty-three million, thirty-five thousand, six hundred twenty-six".