20670603111 has 20 divisors (see below), whose sum is σ = 30883676032. Its totient is φ = 13778006688.

The previous prime is 20670603077. The next prime is 20670603133. The reversal of 20670603111 is 11130607602.

It is not a de Polignac number, because 20670603111 - 2⁶ = 20670603047 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20670603011) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 531450 + ... + 569016.

Almost surely, 2^20670603111 is an apocalyptic number.

20670603111 is a deficient number, since it is larger than the sum of its proper divisors (10213072921).

20670603111 is an equidigital number, since it uses as much as digits as its factorization.

20670603111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44372 (or 44363 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The spelling of 20670603111 in words is "twenty billion, six hundred seventy million, six hundred three thousand, one hundred eleven".