21422402446 has 16 divisors (see below), whose sum is σ = 33534303264. Its totient is φ = 10244401024.

The previous prime is 21422402431. The next prime is 21422402503. The reversal of 21422402446 is 64420422412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 555090 + ... + 592426.

It is an arithmetic number, because the mean of its divisors is an integer number (2095893954).

Almost surely, 2^21422402446 is an apocalyptic number.

21422402446 is a deficient number, since it is larger than the sum of its proper divisors (12111900818).

21422402446 is a wasteful number, since it uses less digits than its factorization.

21422402446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49835.

The product of its (nonzero) digits is 24576, while the sum is 31.

Adding to 21422402446 its reverse (64420422412), we get a palindrome (85842824858).

The spelling of 21422402446 in words is "twenty-one billion, four hundred twenty-two million, four hundred two thousand, four hundred forty-six".