2021006778004 has 48 divisors (see below), whose sum is σ = 3734342954496. Its totient is φ = 955900915200.

The previous prime is 2021006777969. The next prime is 2021006778073. The reversal of 2021006778004 is 4008776001202.

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, 79812 + ... + 2012059.

It is an arithmetic number, because the mean of its divisors is an integer number (77798811552).

Almost surely, 2^{2021006778004} is an apocalyptic number.

It is an amenable number.

2021006778004 is a deficient number, since it is larger than the sum of its proper divisors (1713336176492).

2021006778004 is a wasteful number, since it uses less digits than its factorization.

2021006778004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2092096 (or 2092094 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 37.

The spelling of 2021006778004 in words is "two trillion, twenty-one billion, six million, seven hundred seventy-eight thousand, four".