20477621323 has 2 divisors, whose sum is σ = 20477621324. Its totient is φ = 20477621322.

The previous prime is 20477621267. The next prime is 20477621341. The reversal of 20477621323 is 32312677402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20477621323 - 2⁹ = 20477620811 is a prime.

It is not a weakly prime, because it can be changed into another prime (20477621123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10238810661 + 10238810662.

It is an arithmetic number, because the mean of its divisors is an integer number (10238810662).

Almost surely, 2^20477621323 is an apocalyptic number.

20477621323 is a deficient number, since it is larger than the sum of its proper divisors (1).

20477621323 is an equidigital number, since it uses as much as digits as its factorization.

20477621323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84672, while the sum is 37.

The spelling of 20477621323 in words is "twenty billion, four hundred seventy-seven million, six hundred twenty-one thousand, three hundred twenty-three".