20907201 has 32 divisors (see below), whose sum is σ = 34124800. Its totient is φ = 11119680.

The previous prime is 20907199. The next prime is 20907203. The reversal of 20907201 is 10270902.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20907199) and next prime (20907203).

It is not a de Polignac number, because 20907201 - 2¹ = 20907199 is a prime.

It is a super-2 number, since 2×20907201² = 874222107308802, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20907203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23910 + ... + 24768.

It is an arithmetic number, because the mean of its divisors is an integer number (1066400).

Almost surely, 2^20907201 is an apocalyptic number.

20907201 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20907201 is a deficient number, since it is larger than the sum of its proper divisors (13217599).

20907201 is a wasteful number, since it uses less digits than its factorization.

20907201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 949.

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 20907201 is about 4572.4392833585. The cubic root of 20907201 is about 275.4854280212.

The spelling of 20907201 in words is "twenty million, nine hundred seven thousand, two hundred one".