21113948036 has 24 divisors (see below), whose sum is σ = 37044399840. Its totient is φ = 10529865792.

The previous prime is 21113948029. The next prime is 21113948041. The reversal of 21113948036 is 63084931112.

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, 3620555 + ... + 3626381.

It is an arithmetic number, because the mean of its divisors is an integer number (1543516660).

Almost surely, 2^21113948036 is an apocalyptic number.

It is an amenable number.

21113948036 is a deficient number, since it is larger than the sum of its proper divisors (15930451804).

21113948036 is a wasteful number, since it uses less digits than its factorization.

21113948036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8003 (or 8001 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 38.

The spelling of 21113948036 in words is "twenty-one billion, one hundred thirteen million, nine hundred forty-eight thousand, thirty-six".