20616981103 has 2 divisors, whose sum is σ = 20616981104. Its totient is φ = 20616981102.

The previous prime is 20616981101. The next prime is 20616981137. The reversal of 20616981103 is 30118961602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20616981103 - 2¹ = 20616981101 is a prime.

Together with 20616981101, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20616981101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10308490551 + 10308490552.

It is an arithmetic number, because the mean of its divisors is an integer number (10308490552).

Almost surely, 2^20616981103 is an apocalyptic number.

20616981103 is a deficient number, since it is larger than the sum of its proper divisors (1).

20616981103 is an equidigital number, since it uses as much as digits as its factorization.

20616981103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 37.

The spelling of 20616981103 in words is "twenty billion, six hundred sixteen million, nine hundred eighty-one thousand, one hundred three".