20511014401 has 2 divisors, whose sum is σ = 20511014402. Its totient is φ = 20511014400.

The previous prime is 20511014383. The next prime is 20511014423. The reversal of 20511014401 is 10441011502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20254982400 + 256032001 = 142320^2 + 16001^2 .

It is a cyclic number.

It is not a de Polignac number, because 20511014401 - 2¹⁹ = 20510490113 is a prime.

It is not a weakly prime, because it can be changed into another prime (20511014431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10255507200 + 10255507201.

It is an arithmetic number, because the mean of its divisors is an integer number (10255507201).

Almost surely, 2^20511014401 is an apocalyptic number.

It is an amenable number.

20511014401 is a deficient number, since it is larger than the sum of its proper divisors (1).

20511014401 is an equidigital number, since it uses as much as digits as its factorization.

20511014401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 160, while the sum is 19.

Adding to 20511014401 its reverse (10441011502), we get a palindrome (30952025903).

It can be divided in two parts, 2051101 and 4401, that added together give a palindrome (2055502).

The spelling of 20511014401 in words is "twenty billion, five hundred eleven million, fourteen thousand, four hundred one".