20606555147 has 2 divisors, whose sum is σ = 20606555148. Its totient is φ = 20606555146.

The previous prime is 20606555129. The next prime is 20606555231. The reversal of 20606555147 is 74155560602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20606555147 - 2²⁸ = 20338119691 is a prime.

It is not a weakly prime, because it can be changed into another prime (20606515147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10303277573 + 10303277574.

It is an arithmetic number, because the mean of its divisors is an integer number (10303277574).

Almost surely, 2^20606555147 is an apocalyptic number.

20606555147 is a deficient number, since it is larger than the sum of its proper divisors (1).

20606555147 is an equidigital number, since it uses as much as digits as its factorization.

20606555147 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252000, while the sum is 41.

The spelling of 20606555147 in words is "twenty billion, six hundred six million, five hundred fifty-five thousand, one hundred forty-seven".