20414557 has 2 divisors, whose sum is σ = 20414558. Its totient is φ = 20414556.

The previous prime is 20414549. The next prime is 20414561. The reversal of 20414557 is 75541402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17355556 + 3059001 = 4166^2 + 1749^2 .

It is a cyclic number.

It is not a de Polignac number, because 20414557 - 2³ = 20414549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20414257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10207278 + 10207279.

It is an arithmetic number, because the mean of its divisors is an integer number (10207279).

Almost surely, 2^20414557 is an apocalyptic number.

It is an amenable number.

20414557 is a deficient number, since it is larger than the sum of its proper divisors (1).

20414557 is an equidigital number, since it uses as much as digits as its factorization.

20414557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5600, while the sum is 28.

The square root of 20414557 is about 4518.2471158625. The cubic root of 20414557 is about 273.3044187472.

Adding to 20414557 its reverse (75541402), we get a palindrome (95955959).

The spelling of 20414557 in words is "twenty million, four hundred fourteen thousand, five hundred fifty-seven".