21161413662 has 32 divisors (see below), whose sum is σ = 42483388032. Its totient is φ = 7027097184.

The previous prime is 21161413643. The next prime is 21161413717. The reversal of 21161413662 is 26631416112.

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 15 ways as a sum of consecutive naturals, for example, 1741813 + ... + 1753919.

It is an arithmetic number, because the mean of its divisors is an integer number (1327605876).

Almost surely, 2^21161413662 is an apocalyptic number.

21161413662 is an abundant number, since it is smaller than the sum of its proper divisors (21321974370).

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

21161413662 is a wasteful number, since it uses less digits than its factorization.

21161413662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13192.

The product of its digits is 10368, while the sum is 33.

Adding to 21161413662 its reverse (26631416112), we get a palindrome (47792829774).

The spelling of 21161413662 in words is "twenty-one billion, one hundred sixty-one million, four hundred thirteen thousand, six hundred sixty-two".