20411390 has 16 divisors (see below), whose sum is σ = 38902032. Its totient is φ = 7684224.

The previous prime is 20411387. The next prime is 20411411. The reversal of 20411390 is 9311402.

20411390 = 55² + 56² + ... + 394².

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59864 + ... + 60203.

It is an arithmetic number, because the mean of its divisors is an integer number (2431377).

Almost surely, 2^20411390 is an apocalyptic number.

20411390 is a deficient number, since it is larger than the sum of its proper divisors (18490642).

20411390 is a wasteful number, since it uses less digits than its factorization.

20411390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120091.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 20411390 is about 4517.8966344971. The cubic root of 20411390 is about 273.2902850442.

Adding to 20411390 its reverse (9311402), we get a palindrome (29722792).

The spelling of 20411390 in words is "twenty million, four hundred eleven thousand, three hundred ninety".