20920525109 has 8 divisors (see below), whose sum is σ = 22823437728. Its totient is φ = 19017786960.

The previous prime is 20920525103. The next prime is 20920525121. The reversal of 20920525109 is 90152502902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20920525109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20920525103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 453614 + ... + 497600.

It is an arithmetic number, because the mean of its divisors is an integer number (2852929716).

Almost surely, 2^20920525109 is an apocalyptic number.

It is an amenable number.

20920525109 is a deficient number, since it is larger than the sum of its proper divisors (1902912619).

20920525109 is a wasteful number, since it uses less digits than its factorization.

20920525109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87235.

The product of its (nonzero) digits is 16200, while the sum is 35.

The spelling of 20920525109 in words is "twenty billion, nine hundred twenty million, five hundred twenty-five thousand, one hundred nine".