21703506140 has 12 divisors (see below), whose sum is σ = 45577362936. Its totient is φ = 8681402448.

The previous prime is 21703506137. The next prime is 21703506221. The reversal of 21703506140 is 4160530712.

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, 542587634 + ... + 542587673.

It is an arithmetic number, because the mean of its divisors is an integer number (3798113578).

Almost surely, 2^21703506140 is an apocalyptic number.

21703506140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21703506140 is an abundant number, since it is smaller than the sum of its proper divisors (23873856796).

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

21703506140 is a wasteful number, since it uses less digits than its factorization.

21703506140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1085175316 (or 1085175314 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The spelling of 21703506140 in words is "twenty-one billion, seven hundred three million, five hundred six thousand, one hundred forty".