20685448074 has 32 divisors (see below), whose sum is σ = 41811456960. Its totient is φ = 6821770752.

The previous prime is 20685448073. The next prime is 20685448081. The reversal of 20685448074 is 47084458602.

It is not an unprimeable number, because it can be changed into a prime (20685448073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3234472 + ... + 3240860.

It is an arithmetic number, because the mean of its divisors is an integer number (1306608030).

Almost surely, 2^20685448074 is an apocalyptic number.

20685448074 is an abundant number, since it is smaller than the sum of its proper divisors (21126008886).

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

20685448074 is a wasteful number, since it uses less digits than its factorization.

20685448074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12054.

The product of its (nonzero) digits is 1720320, while the sum is 48.

The spelling of 20685448074 in words is "twenty billion, six hundred eighty-five million, four hundred forty-eight thousand, seventy-four".