21235457350 has 96 divisors (see below), whose sum is σ = 45541504800. Its totient is φ = 7312435200.

The previous prime is 21235457317. The next prime is 21235457351. The reversal of 21235457350 is 5375453212.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21235457351) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 445680 + ... + 491020.

It is an arithmetic number, because the mean of its divisors is an integer number (474390675).

Almost surely, 2^21235457350 is an apocalyptic number.

21235457350 is an abundant number, since it is smaller than the sum of its proper divisors (24306047450).

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

21235457350 is a wasteful number, since it uses less digits than its factorization.

21235457350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45418 (or 45413 counting only the distinct ones).

The product of its (nonzero) digits is 126000, while the sum is 37.

The spelling of 21235457350 in words is "twenty-one billion, two hundred thirty-five million, four hundred fifty-seven thousand, three hundred fifty".