2021903724 has 12 divisors (see below), whose sum is σ = 4717775384. Its totient is φ = 673967904.

The previous prime is 2021903713. The next prime is 2021903773. The reversal of 2021903724 is 4273091202.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 2021903691 and 2021903700.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84245977 + ... + 84246000.

Almost surely, 2^2021903724 is an apocalyptic number.

It is an amenable number.

2021903724 is an abundant number, since it is smaller than the sum of its proper divisors (2695871660).

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

2021903724 is a wasteful number, since it uses less digits than its factorization.

2021903724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168491984 (or 168491982 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 2021903724 is about 44965.5837724809. The cubic root of 2021903724 is about 1264.5038541335.

Adding to 2021903724 its reverse (4273091202), we get a palindrome (6294994926).

The spelling of 2021903724 in words is "two billion, twenty-one million, nine hundred three thousand, seven hundred twenty-four".