20616291903 has 8 divisors (see below), whose sum is σ = 27582207408. Its totient is φ = 13697285504.

The previous prime is 20616291887. The next prime is 20616291911. The reversal of 20616291903 is 30919261602.

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 20616291903 - 2⁴ = 20616291887 is a prime.

It is a super-2 number, since 2×20616291903² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20616291953) 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, 11726250 + ... + 11728007.

It is an arithmetic number, because the mean of its divisors is an integer number (3447775926).

Almost surely, 2^20616291903 is an apocalyptic number.

20616291903 is a deficient number, since it is larger than the sum of its proper divisors (6965915505).

20616291903 is a wasteful number, since it uses less digits than its factorization.

20616291903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23454553.

The product of its (nonzero) digits is 34992, while the sum is 39.

The spelling of 20616291903 in words is "twenty billion, six hundred sixteen million, two hundred ninety-one thousand, nine hundred three".