21424423102 has 8 divisors (see below), whose sum is σ = 32159610000. Its totient is φ = 10704553104.

The previous prime is 21424423093. The next prime is 21424423151. The reversal of 21424423102 is 20132442412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21424423102² (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 3 ways as a sum of consecutive naturals, for example, 3825727 + ... + 3831322.

It is an arithmetic number, because the mean of its divisors is an integer number (4019951250).

Almost surely, 2^21424423102 is an apocalyptic number.

21424423102 is a deficient number, since it is larger than the sum of its proper divisors (10735186898).

21424423102 is a wasteful number, since it uses less digits than its factorization.

21424423102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7658450.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 21424423102 its reverse (20132442412), we get a palindrome (41556865514).

It can be divided in two parts, 2142 and 4423102, that added together give a palindrome (4425244).

The spelling of 21424423102 in words is "twenty-one billion, four hundred twenty-four million, four hundred twenty-three thousand, one hundred two".