20423252301520 has 40 divisors (see below), whose sum is σ = 47485054761984. Its totient is φ = 8169130054272.

The previous prime is 20423252301457. The next prime is 20423252301523. The reversal of 20423252301520 is 2510325232402.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20423252301523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1214097 + ... + 6505423.

Almost surely, 2^{20423252301520} is an apocalyptic number.

20423252301520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20423252301520 is an abundant number, since it is smaller than the sum of its proper divisors (27061802460464).

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

20423252301520 is a wasteful number, since it uses less digits than its factorization.

20423252301520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5339587 (or 5339581 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 31.

Adding to 20423252301520 its reverse (2510325232402), we get a palindrome (22933577533922).

The spelling of 20423252301520 in words is "twenty trillion, four hundred twenty-three billion, two hundred fifty-two million, three hundred one thousand, five hundred twenty".