2021967544 has 8 divisors (see below), whose sum is σ = 3791189160. Its totient is φ = 1010983768.

The previous prime is 2021967511. The next prime is 2021967553. The reversal of 2021967544 is 4457691202.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 2021967497 and 2021967506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126372964 + ... + 126372979.

It is an arithmetic number, because the mean of its divisors is an integer number (473898645).

Almost surely, 2^2021967544 is an apocalyptic number.

It is an amenable number.

2021967544 is a deficient number, since it is larger than the sum of its proper divisors (1769221616).

2021967544 is a wasteful number, since it uses less digits than its factorization.

2021967544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252745949 (or 252745945 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 2021967544 is about 44966.2934207391. The cubic root of 2021967544 is about 1264.5171583916.

The spelling of 2021967544 in words is "two billion, twenty-one million, nine hundred sixty-seven thousand, five hundred forty-four".