21422908450 has 24 divisors (see below), whose sum is σ = 39974762880. Its totient is φ = 8541603600.

The previous prime is 21422908433. The next prime is 21422908457. The reversal of 21422908450 is 5480922412.

It is not an unprimeable number, because it can be changed into a prime (21422908457) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 673290 + ... + 704389.

It is an arithmetic number, because the mean of its divisors is an integer number (1665615120).

Almost surely, 2^21422908450 is an apocalyptic number.

21422908450 is a deficient number, since it is larger than the sum of its proper divisors (18551854430).

21422908450 is a wasteful number, since it uses less digits than its factorization.

21422908450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1378002 (or 1377997 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 37.

The spelling of 21422908450 in words is "twenty-one billion, four hundred twenty-two million, nine hundred eight thousand, four hundred fifty".