20022200977 has 2 divisors, whose sum is σ = 20022200978. Its totient is φ = 20022200976.

The previous prime is 20022200951. The next prime is 20022201013. The reversal of 20022200977 is 77900222002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15506226576 + 4515974401 = 124524^2 + 67201^2 .

It is a cyclic number.

It is not a de Polignac number, because 20022200977 - 2¹¹ = 20022198929 is a prime.

It is not a weakly prime, because it can be changed into another prime (20022200917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10011100488 + 10011100489.

It is an arithmetic number, because the mean of its divisors is an integer number (10011100489).

Almost surely, 2^20022200977 is an apocalyptic number.

It is an amenable number.

20022200977 is a deficient number, since it is larger than the sum of its proper divisors (1).

20022200977 is an equidigital number, since it uses as much as digits as its factorization.

20022200977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 31.

Adding to 20022200977 its reverse (77900222002), we get a palindrome (97922422979).

The spelling of 20022200977 in words is "twenty billion, twenty-two million, two hundred thousand, nine hundred seventy-seven".