20219377 has 2 divisors, whose sum is σ = 20219378. Its totient is φ = 20219376.

The previous prime is 20219371. The next prime is 20219383. The reversal of 20219377 is 77391202.

It is a balanced prime because it is at equal distance from previous prime (20219371) and next prime (20219383).

It can be written as a sum of positive squares in only one way, i.e., 18800896 + 1418481 = 4336^2 + 1191^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20219377 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20219371) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10109688 + 10109689.

It is an arithmetic number, because the mean of its divisors is an integer number (10109689).

Almost surely, 2^20219377 is an apocalyptic number.

It is an amenable number.

20219377 is a deficient number, since it is larger than the sum of its proper divisors (1).

20219377 is an equidigital number, since it uses as much as digits as its factorization.

20219377 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5292, while the sum is 31.

The square root of 20219377 is about 4496.5961570948. The cubic root of 20219377 is about 272.4306228569.

The spelling of 20219377 in words is "twenty million, two hundred nineteen thousand, three hundred seventy-seven".