20101667247 has 12 divisors (see below), whose sum is σ = 29743930944. Its totient is φ = 13074254880.

The previous prime is 20101667237. The next prime is 20101667317. The reversal of 20101667247 is 74276610102.

It is not a de Polignac number, because 20101667247 - 2¹² = 20101663151 is a prime.

It is a super-2 number, since 2×20101667247² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20101667207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27237663 + ... + 27238400.

It is an arithmetic number, because the mean of its divisors is an integer number (2478660912).

Almost surely, 2^20101667247 is an apocalyptic number.

20101667247 is a deficient number, since it is larger than the sum of its proper divisors (9642263697).

20101667247 is a wasteful number, since it uses less digits than its factorization.

20101667247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54476110 (or 54476107 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The spelling of 20101667247 in words is "twenty billion, one hundred one million, six hundred sixty-seven thousand, two hundred forty-seven".