20402411 has 2 divisors, whose sum is σ = 20402412. Its totient is φ = 20402410.

The previous prime is 20402407. The next prime is 20402419. The reversal of 20402411 is 11420402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20402411 - 2² = 20402407 is a prime.

It is a super-2 number, since 2×20402411² = 832516749225842, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20402419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10201205 + 10201206.

It is an arithmetic number, because the mean of its divisors is an integer number (10201206).

Almost surely, 2^20402411 is an apocalyptic number.

20402411 is a deficient number, since it is larger than the sum of its proper divisors (1).

20402411 is an equidigital number, since it uses as much as digits as its factorization.

20402411 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 20402411 is about 4516.9028105550. The cubic root of 20402411 is about 273.2502055693.

Adding to 20402411 its reverse (11420402), we get a palindrome (31822813).

Subtracting from 20402411 its reverse (11420402), we obtain a square (8982009 = 2997²).

The spelling of 20402411 in words is "twenty million, four hundred two thousand, four hundred eleven".