20526694671 has 32 divisors (see below), whose sum is σ = 32335200256. Its totient is φ = 11334492000.

The previous prime is 20526694667. The next prime is 20526694681. The reversal of 20526694671 is 17649662502.

It is not a de Polignac number, because 20526694671 - 2² = 20526694667 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20526694671.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20526694681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 427026 + ... + 472656.

It is an arithmetic number, because the mean of its divisors is an integer number (1010475008).

Almost surely, 2^20526694671 is an apocalyptic number.

20526694671 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20526694671 is a deficient number, since it is larger than the sum of its proper divisors (11808505585).

20526694671 is a wasteful number, since it uses less digits than its factorization.

20526694671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46363.

The product of its (nonzero) digits is 1088640, while the sum is 48.

The spelling of 20526694671 in words is "twenty billion, five hundred twenty-six million, six hundred ninety-four thousand, six hundred seventy-one".