21140422626 has 16 divisors (see below), whose sum is σ = 42369120000. Its totient is φ = 7032095088.

The previous prime is 21140422603. The next prime is 21140422661. The reversal of 21140422626 is 62622404112.

It is a junction number, because it is equal to n+sod(n) for n = 21140422593 and 21140422602.

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, 3675001 + ... + 3680748.

It is an arithmetic number, because the mean of its divisors is an integer number (2648070000).

Almost surely, 2^21140422626 is an apocalyptic number.

21140422626 is an abundant number, since it is smaller than the sum of its proper divisors (21228697374).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21140422626 is a wasteful number, since it uses less digits than its factorization.

21140422626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7356233.

The product of its (nonzero) digits is 9216, while the sum is 30.

Adding to 21140422626 its reverse (62622404112), we get a palindrome (83762826738).

The spelling of 21140422626 in words is "twenty-one billion, one hundred forty million, four hundred twenty-two thousand, six hundred twenty-six".