20201311020 has 48 divisors (see below), whose sum is σ = 61705824768. Its totient is φ = 4897287360.

The previous prime is 20201311019. The next prime is 20201311027. The reversal of 20201311020 is 2011310202.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 20201310987 and 20201311005.

It is not an unprimeable number, because it can be changed into a prime (20201311027) 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, 15303364 + ... + 15304683.

It is an arithmetic number, because the mean of its divisors is an integer number (1285538016).

Almost surely, 2^20201311020 is an apocalyptic number.

20201311020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20201311020 is an abundant number, since it is smaller than the sum of its proper divisors (41504513748).

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

20201311020 is a wasteful number, since it uses less digits than its factorization.

20201311020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30608070 (or 30608068 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 20201311020 its reverse (2011310202), we get a palindrome (22212621222).

The spelling of 20201311020 in words is "twenty billion, two hundred one million, three hundred eleven thousand, twenty".