20021320123030 has 32 divisors (see below), whose sum is σ = 37281749666400. Its totient is φ = 7732232777472.

The previous prime is 20021320122967. The next prime is 20021320123031. The reversal of 20021320123030 is 3032102312002.

It is a junction number, because it is equal to n+sod(n) for n = 20021320122989 and 20021320123007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021320123031) 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, 16318801 + ... + 17502739.

It is an arithmetic number, because the mean of its divisors is an integer number (1165054677075).

Almost surely, 2^{20021320123030} is an apocalyptic number.

20021320123030 is a deficient number, since it is larger than the sum of its proper divisors (17260429543370).

20021320123030 is a wasteful number, since it uses less digits than its factorization.

20021320123030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1242288.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 20021320123030 its reverse (3032102312002), we get a palindrome (23053422435032).

The spelling of 20021320123030 in words is "twenty trillion, twenty-one billion, three hundred twenty million, one hundred twenty-three thousand, thirty".