20477207629 has 2 divisors, whose sum is σ = 20477207630. Its totient is φ = 20477207628.

The previous prime is 20477207609. The next prime is 20477207689. The reversal of 20477207629 is 92670277402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17582229604 + 2894978025 = 132598^2 + 53805^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20477207629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20477207609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10238603814 + 10238603815.

It is an arithmetic number, because the mean of its divisors is an integer number (10238603815).

Almost surely, 2^20477207629 is an apocalyptic number.

It is an amenable number.

20477207629 is a deficient number, since it is larger than the sum of its proper divisors (1).

20477207629 is an equidigital number, since it uses as much as digits as its factorization.

20477207629 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 592704, while the sum is 46.

The spelling of 20477207629 in words is "twenty billion, four hundred seventy-seven million, two hundred seven thousand, six hundred twenty-nine".