21452402352 has 80 divisors (see below), whose sum is σ = 59157285120. Its totient is φ = 6679008000.

The previous prime is 21452402351. The next prime is 21452402399. The reversal of 21452402352 is 25320425412.

It is not an unprimeable number, because it can be changed into a prime (21452402351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100899 + ... + 230402.

It is an arithmetic number, because the mean of its divisors is an integer number (739466064).

Almost surely, 2^21452402352 is an apocalyptic number.

It is an amenable number.

21452402352 is an abundant number, since it is smaller than the sum of its proper divisors (37704882768).

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

21452402352 is a wasteful number, since it uses less digits than its factorization.

21452402352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331402 (or 331396 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

Adding to 21452402352 its reverse (25320425412), we get a palindrome (46772827764).

The spelling of 21452402352 in words is "twenty-one billion, four hundred fifty-two million, four hundred two thousand, three hundred fifty-two".