20201231530 has 64 divisors (see below), whose sum is σ = 38233552896. Its totient is φ = 7674912000.

The previous prime is 20201231521. The next prime is 20201231549. The reversal of 20201231530 is 3513210202.

It is a super-2 number, since 2×20201231530² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20201231498 and 20201231507.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11931364 + ... + 11933056.

It is an arithmetic number, because the mean of its divisors is an integer number (597399264).

Almost surely, 2^20201231530 is an apocalyptic number.

20201231530 is a deficient number, since it is larger than the sum of its proper divisors (18032321366).

20201231530 is a wasteful number, since it uses less digits than its factorization.

20201231530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2423.

The product of its (nonzero) digits is 360, while the sum is 19.

Adding to 20201231530 its reverse (3513210202), we get a palindrome (23714441732).

The spelling of 20201231530 in words is "twenty billion, two hundred one million, two hundred thirty-one thousand, five hundred thirty".