21443013102 has 32 divisors (see below), whose sum is σ = 49017871872. Its totient is φ = 6125916384.

The previous prime is 21443013071. The next prime is 21443013107. The reversal of 21443013102 is 20131034412.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21443013107) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 476728 + ... + 519764.

It is an arithmetic number, because the mean of its divisors is an integer number (1531808496).

Almost surely, 2^21443013102 is an apocalyptic number.

21443013102 is an abundant number, since it is smaller than the sum of its proper divisors (27574858770).

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

21443013102 is a wasteful number, since it uses less digits than its factorization.

21443013102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54912.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21443013102 its reverse (20131034412), we get a palindrome (41574047514).

The spelling of 21443013102 in words is "twenty-one billion, four hundred forty-three million, thirteen thousand, one hundred two".