21432422046 has 16 divisors (see below), whose sum is σ = 48988393344. Its totient is φ = 6123549144.

The previous prime is 21432422021. The next prime is 21432422057. The reversal of 21432422046 is 64022423412.

It is a super-2 number, since 2×21432422046² (a number of 21 digits) contains 22 as substring.

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, 255147840 + ... + 255147923.

It is an arithmetic number, because the mean of its divisors is an integer number (3061774584).

Almost surely, 2^21432422046 is an apocalyptic number.

21432422046 is an abundant number, since it is smaller than the sum of its proper divisors (27555971298).

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

21432422046 is a wasteful number, since it uses less digits than its factorization.

21432422046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510295775.

The product of its (nonzero) digits is 18432, while the sum is 30.

Adding to 21432422046 its reverse (64022423412), we get a palindrome (85454845458).

The spelling of 21432422046 in words is "twenty-one billion, four hundred thirty-two million, four hundred twenty-two thousand, forty-six".