20920506450330 has 64 divisors (see below), whose sum is σ = 53678841585408. Its totient is φ = 5199659842560.

The previous prime is 20920506450329. The next prime is 20920506450341. The reversal of 20920506450330 is 3305460502902.

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, 199076601 + ... + 199181660.

It is an arithmetic number, because the mean of its divisors is an integer number (838731899772).

Almost surely, 2^{20920506450330} is an apocalyptic number.

20920506450330 is an abundant number, since it is smaller than the sum of its proper divisors (32758335135078).

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

20920506450330 is a wasteful number, since it uses less digits than its factorization.

20920506450330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398258391.

The product of its (nonzero) digits is 194400, while the sum is 39.

The spelling of 20920506450330 in words is "twenty trillion, nine hundred twenty billion, five hundred six million, four hundred fifty thousand, three hundred thirty".