21432613950 has 144 divisors (see below), whose sum is σ = 63374600016. Its totient is φ = 5149670400.

The previous prime is 21432613919. The next prime is 21432614041. The reversal of 21432613950 is 5931623412.

21432613950 is a `hidden beast` number, since 2 + 1 + 4 + 3 + 261 + 395 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 540192 + ... + 578508.

It is an arithmetic number, because the mean of its divisors is an integer number (440101389).

Almost surely, 2^21432613950 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21432613950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31687300008).

21432613950 is an abundant number, since it is smaller than the sum of its proper divisors (41941986066).

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

21432613950 is a wasteful number, since it uses less digits than its factorization.

21432613950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38459 (or 38451 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The spelling of 21432613950 in words is "twenty-one billion, four hundred thirty-two million, six hundred thirteen thousand, nine hundred fifty".