20481850011 has 36 divisors (see below), whose sum is σ = 31911662952. Its totient is φ = 11651036544.

The previous prime is 20481850007. The next prime is 20481850049. The reversal of 20481850011 is 11005818402.

It is a happy number.

It is not a de Polignac number, because 20481850011 - 2² = 20481850007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20481850111) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 31853256 + ... + 31853898.

It is an arithmetic number, because the mean of its divisors is an integer number (886435082).

Almost surely, 2^20481850011 is an apocalyptic number.

20481850011 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20481850011 is a deficient number, since it is larger than the sum of its proper divisors (11429812941).

20481850011 is an frugal number, since it uses more digits than its factorization.

20481850011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1640 (or 990 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 30.

The spelling of 20481850011 in words is "twenty billion, four hundred eighty-one million, eight hundred fifty thousand, eleven".