20477621341 has 2 divisors, whose sum is σ = 20477621342. Its totient is φ = 20477621340.

The previous prime is 20477621323. The next prime is 20477621357. The reversal of 20477621341 is 14312677402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15653763225 + 4823858116 = 125115^2 + 69454^2 .

It is a cyclic number.

It is not a de Polignac number, because 20477621341 - 2³³ = 11887686749 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20477621341.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20477624341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10238810670 + 10238810671.

It is an arithmetic number, because the mean of its divisors is an integer number (10238810671).

Almost surely, 2^20477621341 is an apocalyptic number.

It is an amenable number.

20477621341 is a deficient number, since it is larger than the sum of its proper divisors (1).

20477621341 is an equidigital number, since it uses as much as digits as its factorization.

20477621341 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56448, while the sum is 37.

The spelling of 20477621341 in words is "twenty billion, four hundred seventy-seven million, six hundred twenty-one thousand, three hundred forty-one".