20321125040 has 40 divisors (see below), whose sum is σ = 47382837840. Its totient is φ = 8105014016.

The previous prime is 20321125039. The next prime is 20321125063. The reversal of 20321125040 is 4052112302.

It is a tau number, because it is divible by the number of its divisors (40).

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 7 ways as a sum of consecutive naturals, for example, 338255 + ... + 393774.

It is an arithmetic number, because the mean of its divisors is an integer number (1184570946).

Almost surely, 2^20321125040 is an apocalyptic number.

20321125040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20321125040 is an abundant number, since it is smaller than the sum of its proper divisors (27061712800).

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

20321125040 is a wasteful number, since it uses less digits than its factorization.

20321125040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732389 (or 732383 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 20321125040 its reverse (4052112302), we get a palindrome (24373237342).

The spelling of 20321125040 in words is "twenty billion, three hundred twenty-one million, one hundred twenty-five thousand, forty".