21020325374 has 32 divisors (see below), whose sum is σ = 33540268320. Its totient is φ = 9861409152.

The previous prime is 21020325367. The next prime is 21020325377. The reversal of 21020325374 is 47352302012.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020325377) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1889372 + ... + 1900464.

It is an arithmetic number, because the mean of its divisors is an integer number (1048133385).

Almost surely, 2^21020325374 is an apocalyptic number.

21020325374 is a deficient number, since it is larger than the sum of its proper divisors (12519942946).

21020325374 is a wasteful number, since it uses less digits than its factorization.

21020325374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12044.

The product of its (nonzero) digits is 10080, while the sum is 29.

Adding to 21020325374 its reverse (47352302012), we get a palindrome (68372627386).

The spelling of 21020325374 in words is "twenty-one billion, twenty million, three hundred twenty-five thousand, three hundred seventy-four".