20557053219628 has 24 divisors (see below), whose sum is σ = 38102054886000. Its totient is φ = 9671102443008.

The previous prime is 20557053219617. The next prime is 20557053219667. The reversal of 20557053219628 is 82691235075502.

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, 43591158 + ... + 44060221.

It is an arithmetic number, because the mean of its divisors is an integer number (1587585620250).

Almost surely, 2^{20557053219628} is an apocalyptic number.

It is an amenable number.

20557053219628 is a deficient number, since it is larger than the sum of its proper divisors (17545001666372).

20557053219628 is a wasteful number, since it uses less digits than its factorization.

20557053219628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87654849 (or 87654847 counting only the distinct ones).

The product of its (nonzero) digits is 9072000, while the sum is 55.

The spelling of 20557053219628 in words is "twenty trillion, five hundred fifty-seven billion, fifty-three million, two hundred nineteen thousand, six hundred twenty-eight".