20423121000 has 64 divisors (see below), whose sum is σ = 63720146880. Its totient is φ = 5446164800.

The previous prime is 20423120981. The next prime is 20423121011. The reversal of 20423121000 is 12132402.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3400854 + ... + 3406853.

It is an arithmetic number, because the mean of its divisors is an integer number (995627295).

Almost surely, 2^20423121000 is an apocalyptic number.

20423121000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20423121000 is an abundant number, since it is smaller than the sum of its proper divisors (43297025880).

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

20423121000 is a wasteful number, since it uses less digits than its factorization.

20423121000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6807731 (or 6807717 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 20423121000 its reverse (12132402), we get a palindrome (20435253402).

The spelling of 20423121000 in words is "twenty billion, four hundred twenty-three million, one hundred twenty-one thousand".