20933842440 has 128 divisors (see below), whose sum is σ = 74088529920. Its totient is φ = 4630521600.

The previous prime is 20933842399. The next prime is 20933842453. The reversal of 20933842440 is 4424833902.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 375916 + ... + 427995.

It is an arithmetic number, because the mean of its divisors is an integer number (578816640).

Almost surely, 2^20933842440 is an apocalyptic number.

20933842440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20933842440 is an abundant number, since it is smaller than the sum of its proper divisors (53154687480).

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

20933842440 is a wasteful number, since it uses less digits than its factorization.

20933842440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 803963 (or 803959 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 39.

The spelling of 20933842440 in words is "twenty billion, nine hundred thirty-three million, eight hundred forty-two thousand, four hundred forty".