21543137036 has 24 divisors (see below), whose sum is σ = 39347338464. Its totient is φ = 10301223680.

The previous prime is 21543136987. The next prime is 21543137131. The reversal of 21543137036 is 63073134512.

It is a junction number, because it is equal to n+sod(n) for n = 21543136987 and 21543137005.

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, 519236 + ... + 559188.

It is an arithmetic number, because the mean of its divisors is an integer number (1639472436).

Almost surely, 2^21543137036 is an apocalyptic number.

It is an amenable number.

21543137036 is a deficient number, since it is larger than the sum of its proper divisors (17804201428).

21543137036 is a wasteful number, since it uses less digits than its factorization.

21543137036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45841 (or 45839 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 35.

The spelling of 21543137036 in words is "twenty-one billion, five hundred forty-three million, one hundred thirty-seven thousand, thirty-six".