20550651007 has 2 divisors, whose sum is σ = 20550651008. Its totient is φ = 20550651006.

The previous prime is 20550650987. The next prime is 20550651053. The reversal of 20550651007 is 70015605502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20550651007 - 2¹¹ = 20550648959 is a prime.

It is a super-2 number, since 2×20550651007² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20550651007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20550651067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10275325503 + 10275325504.

It is an arithmetic number, because the mean of its divisors is an integer number (10275325504).

Almost surely, 2^20550651007 is an apocalyptic number.

20550651007 is a deficient number, since it is larger than the sum of its proper divisors (1).

20550651007 is an equidigital number, since it uses as much as digits as its factorization.

20550651007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10500, while the sum is 31.

The spelling of 20550651007 in words is "twenty billion, five hundred fifty million, six hundred fifty-one thousand, seven".