20280107 has 8 divisors (see below), whose sum is σ = 21501312. Its totient is φ = 19094400.

The previous prime is 20280103. The next prime is 20280109. The reversal of 20280107 is 70108202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20280107 - 2² = 20280103 is a prime.

It is a super-2 number, since 2×20280107² = 822565479862898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20280101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7694 + ... + 9987.

It is an arithmetic number, because the mean of its divisors is an integer number (2687664).

Almost surely, 2^20280107 is an apocalyptic number.

20280107 is a deficient number, since it is larger than the sum of its proper divisors (1221205).

20280107 is a wasteful number, since it uses less digits than its factorization.

20280107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17749.

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 20280107 is about 4503.3439797555. The cubic root of 20280107 is about 272.7031036393.

Adding to 20280107 its reverse (70108202), we get a palindrome (90388309).

The spelling of 20280107 in words is "twenty million, two hundred eighty thousand, one hundred seven".