20824136940 has 48 divisors (see below), whose sum is σ = 58569090048. Its totient is φ = 5528197824.

The previous prime is 20824136929. The next prime is 20824136941. The reversal of 20824136940 is 4963142802.

It is not an unprimeable number, because it can be changed into a prime (20824136941) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 764802 + ... + 791561.

It is an arithmetic number, because the mean of its divisors is an integer number (1220189376).

Almost surely, 2^20824136940 is an apocalyptic number.

20824136940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20824136940 is an abundant number, since it is smaller than the sum of its proper divisors (37744953108).

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

20824136940 is a wasteful number, since it uses less digits than its factorization.

20824136940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1556598 (or 1556596 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 39.

The spelling of 20824136940 in words is "twenty billion, eight hundred twenty-four million, one hundred thirty-six thousand, nine hundred forty".