20520106903 has 8 divisors (see below), whose sum is σ = 21427200000. Its totient is φ = 19614256728.

The previous prime is 20520106889. The next prime is 20520106973. The reversal of 20520106903 is 30960102502.

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

It is a cyclic number.

It is not a de Polignac number, because 20520106903 - 2²¹ = 20518009751 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 (20520106973) 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, 276903 + ... + 343096.

It is an arithmetic number, because the mean of its divisors is an integer number (2678400000).

Almost surely, 2^20520106903 is an apocalyptic number.

20520106903 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20520106903 is a deficient number, since it is larger than the sum of its proper divisors (907093097).

20520106903 is a wasteful number, since it uses less digits than its factorization.

20520106903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621461.

The product of its (nonzero) digits is 3240, while the sum is 28.

The spelling of 20520106903 in words is "twenty billion, five hundred twenty million, one hundred six thousand, nine hundred three".