2040620421 has 32 divisors (see below), whose sum is σ = 3248087040. Its totient is φ = 1114210944.

The previous prime is 2040620399. The next prime is 2040620423. The reversal of 2040620421 is 1240260402.

It is not a de Polignac number, because 2040620421 - 2⁹ = 2040619909 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2040620423) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 685825 + ... + 688793.

It is an arithmetic number, because the mean of its divisors is an integer number (101502720).

Almost surely, 2^2040620421 is an apocalyptic number.

2040620421 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2040620421 is a deficient number, since it is larger than the sum of its proper divisors (1207466619).

2040620421 is a wasteful number, since it uses less digits than its factorization.

2040620421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4425.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 2040620421 is about 45173.2268163345. The cubic root of 2040620421 is about 1268.3936996672.

Adding to 2040620421 its reverse (1240260402), we get a palindrome (3280880823).

The spelling of 2040620421 in words is "two billion, forty million, six hundred twenty thousand, four hundred twenty-one".