20401260 has 48 divisors (see below), whose sum is σ = 62318592. Its totient is φ = 4945600.

The previous prime is 20401223. The next prime is 20401273. The reversal of 20401260 is 6210402.

It is a super-2 number, since 2×20401260² = 832422819175200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14796 + ... + 16115.

It is an arithmetic number, because the mean of its divisors is an integer number (1298304).

Almost surely, 2^20401260 is an apocalyptic number.

20401260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20401260 is an abundant number, since it is smaller than the sum of its proper divisors (41917332).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20401260 is a wasteful number, since it uses less digits than its factorization.

20401260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30934 (or 30932 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 20401260 is about 4516.7753984452. The cubic root of 20401260 is about 273.2450670115.

Adding to 20401260 its reverse (6210402), we get a palindrome (26611662).

The spelling of 20401260 in words is "twenty million, four hundred one thousand, two hundred sixty".