2031420564 has 18 divisors (see below), whose sum is σ = 5134979850. Its totient is φ = 677140176.

The previous prime is 2031420557. The next prime is 2031420569. The reversal of 2031420564 is 4650241302.

It can be written as a sum of positive squares in only one way, i.e., 1934240400 + 97180164 = 43980^2 + 9858^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2031420569) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28214139 + ... + 28214210.

Almost surely, 2^2031420564 is an apocalyptic number.

It is an amenable number.

2031420564 is an abundant number, since it is smaller than the sum of its proper divisors (3103559286).

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

2031420564 is a wasteful number, since it uses less digits than its factorization.

2031420564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56428359 (or 56428354 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 2031420564 is about 45071.2831412641. The cubic root of 2031420564 is about 1266.4847016847.

Adding to 2031420564 its reverse (4650241302), we get a palindrome (6681661866).

The spelling of 2031420564 in words is "two billion, thirty-one million, four hundred twenty thousand, five hundred sixty-four".