20909373830 has 32 divisors (see below), whose sum is σ = 40540151808. Its totient is φ = 7742037600.

The previous prime is 20909373827. The next prime is 20909373847. The reversal of 20909373830 is 3837390902.

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 15 ways as a sum of consecutive naturals, for example, 1459166 + ... + 1473425.

It is an arithmetic number, because the mean of its divisors is an integer number (1266879744).

Almost surely, 2^20909373830 is an apocalyptic number.

20909373830 is a deficient number, since it is larger than the sum of its proper divisors (19630777978).

20909373830 is a wasteful number, since it uses less digits than its factorization.

20909373830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2932652.

The product of its (nonzero) digits is 244944, while the sum is 44.

The spelling of 20909373830 in words is "twenty billion, nine hundred nine million, three hundred seventy-three thousand, eight hundred thirty".