21423413000 has 192 divisors, whose sum is σ = 55679747760. Its totient is φ = 7708800000.

The previous prime is 21423412999. The next prime is 21423413023. The reversal of 21423413000 is 31432412.

It can be written as a sum of positive squares in 8 ways, for example, as 576096004 + 20847316996 = 24002^2 + 144386^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12220124 + ... + 12221876.

Almost surely, 2^21423413000 is an apocalyptic number.

21423413000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21423413000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27839873880).

21423413000 is an abundant number, since it is smaller than the sum of its proper divisors (34256334760).

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

21423413000 is a wasteful number, since it uses less digits than its factorization.

21423413000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1897 (or 1872 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21423413000 its reverse (31432412), we get a palindrome (21454845412).

The spelling of 21423413000 in words is "twenty-one billion, four hundred twenty-three million, four hundred thirteen thousand".