20467509820 has 24 divisors (see below), whose sum is σ = 42986591424. Its totient is φ = 8186085696.

The previous prime is 20467509773. The next prime is 20467509857. The reversal of 20467509820 is 2890576402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142342 + ... + 247378.

It is an arithmetic number, because the mean of its divisors is an integer number (1791107976).

Almost surely, 2^20467509820 is an apocalyptic number.

20467509820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20467509820 is an abundant number, since it is smaller than the sum of its proper divisors (22519081604).

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

20467509820 is a wasteful number, since it uses less digits than its factorization.

20467509820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114789 (or 114787 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 43.

The spelling of 20467509820 in words is "twenty billion, four hundred sixty-seven million, five hundred nine thousand, eight hundred twenty".