20154261401 has 2 divisors, whose sum is σ = 20154261402. Its totient is φ = 20154261400.

The previous prime is 20154261397. The next prime is 20154261467. The reversal of 20154261401 is 10416245102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18982226176 + 1172035225 = 137776^2 + 34235^2 .

It is a cyclic number.

It is not a de Polignac number, because 20154261401 - 2² = 20154261397 is a prime.

It is not a weakly prime, because it can be changed into another prime (20154263401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10077130700 + 10077130701.

It is an arithmetic number, because the mean of its divisors is an integer number (10077130701).

Almost surely, 2^20154261401 is an apocalyptic number.

It is an amenable number.

20154261401 is a deficient number, since it is larger than the sum of its proper divisors (1).

20154261401 is an equidigital number, since it uses as much as digits as its factorization.

20154261401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 26.

The spelling of 20154261401 in words is "twenty billion, one hundred fifty-four million, two hundred sixty-one thousand, four hundred one".