21140422616 has 16 divisors (see below), whose sum is σ = 39641100840. Its totient is φ = 10569462400.

The previous prime is 21140422603. The next prime is 21140422661. The reversal of 21140422616 is 61622404112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37091 + ... + 208941.

Almost surely, 2^21140422616 is an apocalyptic number.

It is an amenable number.

21140422616 is a deficient number, since it is larger than the sum of its proper divisors (18500678224).

21140422616 is a wasteful number, since it uses less digits than its factorization.

21140422616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187234 (or 187230 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

Adding to 21140422616 its reverse (61622404112), we get a palindrome (82762826728).

The spelling of 21140422616 in words is "twenty-one billion, one hundred forty million, four hundred twenty-two thousand, six hundred sixteen".