20562803946 has 24 divisors (see below), whose sum is σ = 45756871524. Its totient is φ = 6669017280.

The previous prime is 20562803897. The next prime is 20562803953. The reversal of 20562803946 is 64930826502.

20562803946 is a `hidden beast` number, since 2 + 0 + 562 + 80 + 3 + 9 + 4 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 18520215921 + 2042588025 = 136089^2 + 45195^2 .

It is a super-2 number, since 2×20562803946² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15436875 + ... + 15438206.

Almost surely, 2^20562803946 is an apocalyptic number.

20562803946 is an abundant number, since it is smaller than the sum of its proper divisors (25194067578).

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

20562803946 is a wasteful number, since it uses less digits than its factorization.

20562803946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30875126 (or 30875123 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The spelling of 20562803946 in words is "twenty billion, five hundred sixty-two million, eight hundred three thousand, nine hundred forty-six".