21489003617432 has 32 divisors (see below), whose sum is σ = 43391509518000. Its totient is φ = 9917944020864.

The previous prime is 21489003617413. The next prime is 21489003617437. The reversal of 21489003617432 is 23471630098412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21489003617437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21145838 + ... + 22138754.

Almost surely, 2^{21489003617432} is an apocalyptic number.

It is an amenable number.

21489003617432 is an abundant number, since it is smaller than the sum of its proper divisors (21902505900568).

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

21489003617432 is a wasteful number, since it uses less digits than its factorization.

21489003617432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1201035 (or 1201031 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 50.

The spelling of 21489003617432 in words is "twenty-one trillion, four hundred eighty-nine billion, three million, six hundred seventeen thousand, four hundred thirty-two".