20297424377 has 2 divisors, whose sum is σ = 20297424378. Its totient is φ = 20297424376.

The previous prime is 20297424359. The next prime is 20297424383. The reversal of 20297424377 is 77342479202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19455786256 + 841638121 = 139484^2 + 29011^2 .

It is a cyclic number.

It is not a de Polignac number, because 20297424377 - 2¹² = 20297420281 is a prime.

It is a super-3 number, since 3×20297424377³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (20297424317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10148712188 + 10148712189.

It is an arithmetic number, because the mean of its divisors is an integer number (10148712189).

Almost surely, 2^20297424377 is an apocalyptic number.

It is an amenable number.

20297424377 is a deficient number, since it is larger than the sum of its proper divisors (1).

20297424377 is an equidigital number, since it uses as much as digits as its factorization.

20297424377 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1185408, while the sum is 47.

The spelling of 20297424377 in words is "twenty billion, two hundred ninety-seven million, four hundred twenty-four thousand, three hundred seventy-seven".