20566453630 has 16 divisors (see below), whose sum is σ = 39197241360. Its totient is φ = 7742664832.

The previous prime is 20566453603. The next prime is 20566453643. The reversal of 20566453630 is 3635466502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60489400 + ... + 60489739.

It is an arithmetic number, because the mean of its divisors is an integer number (2449827585).

Almost surely, 2^20566453630 is an apocalyptic number.

20566453630 is a deficient number, since it is larger than the sum of its proper divisors (18630787730).

20566453630 is a wasteful number, since it uses less digits than its factorization.

20566453630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120979163.

The product of its (nonzero) digits is 388800, while the sum is 40.

The spelling of 20566453630 in words is "twenty billion, five hundred sixty-six million, four hundred fifty-three thousand, six hundred thirty".