21423424023020 has 24 divisors (see below), whose sum is σ = 44989444500000. Its totient is φ = 8569321218432.

The previous prime is 21423424022999. The next prime is 21423424023037. The reversal of 21423424023020 is 2032042432412.

It is a super-2 number, since 2×21423424023020² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 718856 + ... + 6585104.

It is an arithmetic number, because the mean of its divisors is an integer number (1874560187500).

Almost surely, 2^{21423424023020} is an apocalyptic number.

21423424023020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21423424023020 is an abundant number, since it is smaller than the sum of its proper divisors (23566020476980).

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

21423424023020 is a wasteful number, since it uses less digits than its factorization.

21423424023020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6048857 (or 6048855 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 21423424023020 its reverse (2032042432412), we get a palindrome (23455466455432).

The spelling of 21423424023020 in words is "twenty-one trillion, four hundred twenty-three billion, four hundred twenty-four million, twenty-three thousand, twenty".