20973509650830 has 32 divisors (see below), whose sum is σ = 54912461632128. Its totient is φ = 5084487188000.

The previous prime is 20973509650801. The next prime is 20973509650831. The reversal of 20973509650830 is 3805690537902.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20973509650831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31778044596 + ... + 31778045255.

It is an arithmetic number, because the mean of its divisors is an integer number (1716014426004).

Almost surely, 2^{20973509650830} is an apocalyptic number.

20973509650830 is an abundant number, since it is smaller than the sum of its proper divisors (33938951981298).

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

20973509650830 is a wasteful number, since it uses less digits than its factorization.

20973509650830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63556089872.

The product of its (nonzero) digits is 12247200, while the sum is 57.

The spelling of 20973509650830 in words is "twenty trillion, nine hundred seventy-three billion, five hundred nine million, six hundred fifty thousand, eight hundred thirty".