20023132001220 has 72 divisors (see below), whose sum is σ = 60973163970264. Its totient is φ = 5318725582848.

The previous prime is 20023132001149. The next prime is 20023132001233. The reversal of 20023132001220 is 2210023132002.

20023132001220 is a `hidden beast` number, since 200 + 23 + 1 + 320 + 0 + 122 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 9708359198976 + 10314772802244 = 3115824^2 + 3211662^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20023132001193 and 20023132001202.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 216373239 + ... + 216465758.

It is an arithmetic number, because the mean of its divisors is an integer number (846849499587).

Almost surely, 2^{20023132001220} is an apocalyptic number.

20023132001220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20023132001220 is an abundant number, since it is smaller than the sum of its proper divisors (40950031969044).

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

20023132001220 is a wasteful number, since it uses less digits than its factorization.

20023132001220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432839269 (or 432839264 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 20023132001220 its reverse (2210023132002), we get a palindrome (22233155133222).

The spelling of 20023132001220 in words is "twenty trillion, twenty-three billion, one hundred thirty-two million, one thousand, two hundred twenty".