21342577450 has 48 divisors (see below), whose sum is σ = 43603369920. Its totient is φ = 7736065920.

The previous prime is 21342577411. The next prime is 21342577499. The reversal of 21342577450 is 5477524312.

It is a super-2 number, since 2×21342577450² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 466539 + ... + 510238.

It is an arithmetic number, because the mean of its divisors is an integer number (908403540).

Almost surely, 2^21342577450 is an apocalyptic number.

21342577450 is an abundant number, since it is smaller than the sum of its proper divisors (22260792470).

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

21342577450 is a wasteful number, since it uses less digits than its factorization.

21342577450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 976831 (or 976826 counting only the distinct ones).

The product of its (nonzero) digits is 235200, while the sum is 40.

The spelling of 21342577450 in words is "twenty-one billion, three hundred forty-two million, five hundred seventy-seven thousand, four hundred fifty".