20548585506 has 16 divisors (see below), whose sum is σ = 42514315200. Its totient is φ = 6613337808.

The previous prime is 20548585469. The next prime is 20548585513. The reversal of 20548585506 is 60558584502.

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, 59047486 + ... + 59047833.

It is an arithmetic number, because the mean of its divisors is an integer number (2657144700).

Almost surely, 2^20548585506 is an apocalyptic number.

20548585506 is an abundant number, since it is smaller than the sum of its proper divisors (21965729694).

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

20548585506 is a wasteful number, since it uses less digits than its factorization.

20548585506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118095353.

The product of its (nonzero) digits is 1920000, while the sum is 48.

The spelling of 20548585506 in words is "twenty billion, five hundred forty-eight million, five hundred eighty-five thousand, five hundred six".