20402368 has 28 divisors (see below), whose sum is σ = 46270672. Its totient is φ = 8743680.

The previous prime is 20402351. The next prime is 20402381. The reversal of 20402368 is 86320402.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (28).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22323 + ... + 23218.

It is an arithmetic number, because the mean of its divisors is an integer number (1652524).

Almost surely, 2^20402368 is an apocalyptic number.

20402368 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20402368 is an abundant number, since it is smaller than the sum of its proper divisors (25868304).

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

20402368 is an equidigital number, since it uses as much as digits as its factorization.

20402368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45560 (or 45550 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 20402368 is about 4516.8980506538. The cubic root of 20402368 is about 273.2500136023.

The spelling of 20402368 in words is "twenty million, four hundred two thousand, three hundred sixty-eight".