20706551995 has 4 divisors (see below), whose sum is σ = 24847862400. Its totient is φ = 16565241592.

The previous prime is 20706551993. The next prime is 20706552043. The reversal of 20706551995 is 59915560702.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20706551995 - 2¹ = 20706551993 is a prime.

It is a super-2 number, since 2×20706551995² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20706551993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2070655195 + ... + 2070655204.

It is an arithmetic number, because the mean of its divisors is an integer number (6211965600).

Almost surely, 2^20706551995 is an apocalyptic number.

20706551995 is a deficient number, since it is larger than the sum of its proper divisors (4141310405).

20706551995 is an equidigital number, since it uses as much as digits as its factorization.

20706551995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4141310404.

The product of its (nonzero) digits is 850500, while the sum is 49.

The spelling of 20706551995 in words is "twenty billion, seven hundred six million, five hundred fifty-one thousand, nine hundred ninety-five".