21162463446 has 16 divisors (see below), whose sum is σ = 42578371584. Its totient is φ = 7011913704.

The previous prime is 21162463429. The next prime is 21162463463. The reversal of 21162463446 is 64436426112.

It is an interprime number because it is at equal distance from previous prime (21162463429) and next prime (21162463463).

It is a super-3 number, since 3×21162463446³ (a number of 32 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10559110 + ... + 10561113.

It is an arithmetic number, because the mean of its divisors is an integer number (2661148224).

Almost surely, 2^21162463446 is an apocalyptic number.

21162463446 is an abundant number, since it is smaller than the sum of its proper divisors (21415908138).

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

21162463446 is a wasteful number, since it uses less digits than its factorization.

21162463446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21120395.

The product of its digits is 165888, while the sum is 39.

Adding to 21162463446 its reverse (64436426112), we get a palindrome (85598889558).

The spelling of 21162463446 in words is "twenty-one billion, one hundred sixty-two million, four hundred sixty-three thousand, four hundred forty-six".