21439032652 has 12 divisors (see below), whose sum is σ = 38812042080. Its totient is φ = 10349877776.

The previous prime is 21439032631. The next prime is 21439032653. The reversal of 21439032652 is 25623093412.

It is not an unprimeable number, because it can be changed into a prime (21439032653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92409508 + ... + 92409739.

It is an arithmetic number, because the mean of its divisors is an integer number (3234336840).

Almost surely, 2^21439032652 is an apocalyptic number.

It is an amenable number.

21439032652 is a deficient number, since it is larger than the sum of its proper divisors (17373009428).

21439032652 is a wasteful number, since it uses less digits than its factorization.

21439032652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184819280 (or 184819278 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 37.

The spelling of 21439032652 in words is "twenty-one billion, four hundred thirty-nine million, thirty-two thousand, six hundred fifty-two".