2820421866508 has 12 divisors (see below), whose sum is σ = 5195513964760. Its totient is φ = 1335989305152.

The previous prime is 2820421866487. The next prime is 2820421866517. The reversal of 2820421866508 is 8056681240282.

It is a super-2 number, since 2×2820421866508² (a number of 26 digits) contains 22 as substring.

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, 18555406941 + ... + 18555407092.

Almost surely, 2^{2820421866508} is an apocalyptic number.

It is an amenable number.

2820421866508 is a deficient number, since it is larger than the sum of its proper divisors (2375092098252).

2820421866508 is a wasteful number, since it uses less digits than its factorization.

2820421866508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37110814056 (or 37110814054 counting only the distinct ones).

The product of its (nonzero) digits is 2949120, while the sum is 52.

The spelling of 2820421866508 in words is "two trillion, eight hundred twenty billion, four hundred twenty-one million, eight hundred sixty-six thousand, five hundred eight".