20106724 has 24 divisors (see below), whose sum is σ = 39626496. Its totient is φ = 8844000.

The previous prime is 20106721. The next prime is 20106727. The reversal of 20106724 is 42760102.

It is an interprime number because it is at equal distance from previous prime (20106721) and next prime (20106727).

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 20106695 and 20106704.

It is not an unprimeable number, because it can be changed into a prime (20106721) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 6007 + ... + 8734.

It is an arithmetic number, because the mean of its divisors is an integer number (1651104).

Almost surely, 2^20106724 is an apocalyptic number.

It is an amenable number.

20106724 is a deficient number, since it is larger than the sum of its proper divisors (19519772).

20106724 is a wasteful number, since it uses less digits than its factorization.

20106724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14787 (or 14785 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 20106724 is about 4484.0521852449. The cubic root of 20106724 is about 271.9237278935.

Adding to 20106724 its reverse (42760102), we get a palindrome (62866826).

The spelling of 20106724 in words is "twenty million, one hundred six thousand, seven hundred twenty-four".