20461187401 has 2 divisors, whose sum is σ = 20461187402. Its totient is φ = 20461187400.

The previous prime is 20461187387. The next prime is 20461187413. The reversal of 20461187401 is 10478116402.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19443513600 + 1017673801 = 139440^2 + 31901^2 .

It is a cyclic number.

It is not a de Polignac number, because 20461187401 - 2³¹ = 18313703753 is a prime.

It is a super-2 number, since 2×20461187401² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20461187431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10230593700 + 10230593701.

It is an arithmetic number, because the mean of its divisors is an integer number (10230593701).

Almost surely, 2^20461187401 is an apocalyptic number.

It is an amenable number.

20461187401 is a deficient number, since it is larger than the sum of its proper divisors (1).

20461187401 is an equidigital number, since it uses as much as digits as its factorization.

20461187401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10752, while the sum is 34.

The spelling of 20461187401 in words is "twenty billion, four hundred sixty-one million, one hundred eighty-seven thousand, four hundred one".