20401310 has 16 divisors (see below), whose sum is σ = 37226736. Its totient is φ = 8048448.

The previous prime is 20401291. The next prime is 20401321. The reversal of 20401310 is 1310402.

It is a happy number.

It is a super-2 number, since 2×20401310² = 832426899432200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20401291 and 20401300.

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, 13244 + ... + 14703.

It is an arithmetic number, because the mean of its divisors is an integer number (2326671).

Almost surely, 2^20401310 is an apocalyptic number.

20401310 is a deficient number, since it is larger than the sum of its proper divisors (16825426).

20401310 is a wasteful number, since it uses less digits than its factorization.

20401310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28027.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 20401310 is about 4516.7809333639. The cubic root of 20401310 is about 273.2452902370.

Adding to 20401310 its reverse (1310402), we get a palindrome (21711712).

The spelling of 20401310 in words is "twenty million, four hundred one thousand, three hundred ten".