2040021243 has 48 divisors (see below), whose sum is σ = 3223584000. Its totient is φ = 1235672064.

The previous prime is 2040021239. The next prime is 2040021253. The reversal of 2040021243 is 3421200402.

2040021243 is a `hidden beast` number, since 2 + 0 + 400 + 21 + 243 = 666.

2040021243 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2040021243 - 2² = 2040021239 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2040021223) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4258678 + ... + 4259156.

It is an arithmetic number, because the mean of its divisors is an integer number (67158000).

Almost surely, 2^2040021243 is an apocalyptic number.

2040021243 is a deficient number, since it is larger than the sum of its proper divisors (1183562757).

2040021243 is a wasteful number, since it uses less digits than its factorization.

2040021243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 996 (or 993 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 2040021243 is about 45166.5943258953. The cubic root of 2040021243 is about 1268.2695433095.

Adding to 2040021243 its reverse (3421200402), we get a palindrome (5461221645).

The spelling of 2040021243 in words is "two billion, forty million, twenty-one thousand, two hundred forty-three".