20408119820 has 48 divisors (see below), whose sum is σ = 47893489056. Its totient is φ = 7240128000.

The previous prime is 20408119789. The next prime is 20408119843. The reversal of 20408119820 is 2891180402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1122251 + ... + 1140290.

It is an arithmetic number, because the mean of its divisors is an integer number (997781022).

Almost surely, 2^20408119820 is an apocalyptic number.

20408119820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20408119820 is an abundant number, since it is smaller than the sum of its proper divisors (27485369236).

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

20408119820 is a wasteful number, since it uses less digits than its factorization.

20408119820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2262602 (or 2262600 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 35.

The spelling of 20408119820 in words is "twenty billion, four hundred eight million, one hundred nineteen thousand, eight hundred twenty".