2021236404 has 48 divisors (see below), whose sum is σ = 5175830016. Its totient is φ = 608821600.

The previous prime is 2021236367. The next prime is 2021236423. The reversal of 2021236404 is 4046321202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23802 + ... + 67889.

It is an arithmetic number, because the mean of its divisors is an integer number (107829792).

Almost surely, 2^2021236404 is an apocalyptic number.

It is an amenable number.

2021236404 is an abundant number, since it is smaller than the sum of its proper divisors (3154593612).

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

2021236404 is a wasteful number, since it uses less digits than its factorization.

2021236404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91876 (or 91874 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 2021236404 is about 44958.1628183359. The cubic root of 2021236404 is about 1264.3647242707.

Adding to 2021236404 its reverse (4046321202), we get a palindrome (6067557606).

It can be divided in two parts, 20212 and 36404, that added together give a triangular number (56616 = T₃₃₆).

The spelling of 2021236404 in words is "two billion, twenty-one million, two hundred thirty-six thousand, four hundred four".