21423013423134 has 64 divisors (see below), whose sum is σ = 44283426969600. Its totient is φ = 6905677303008.

The previous prime is 21423013423109. The next prime is 21423013423159. The reversal of 21423013423134 is 43132431032412.

It is an interprime number because it is at equal distance from previous prime (21423013423109) and next prime (21423013423159).

It is a junction number, because it is equal to n+sod(n) for n = 21423013423095 and 21423013423104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16621777 + ... + 17864195.

It is an arithmetic number, because the mean of its divisors is an integer number (691928546400).

Almost surely, 2^{21423013423134} is an apocalyptic number.

21423013423134 is an abundant number, since it is smaller than the sum of its proper divisors (22860413546466).

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

21423013423134 is a wasteful number, since it uses less digits than its factorization.

21423013423134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1243277.

The product of its (nonzero) digits is 41472, while the sum is 33.

Adding to 21423013423134 its reverse (43132431032412), we get a palindrome (64555444455546).

The spelling of 21423013423134 in words is "twenty-one trillion, four hundred twenty-three billion, thirteen million, four hundred twenty-three thousand, one hundred thirty-four".