20871729476 has 48 divisors (see below), whose sum is σ = 40686363648. Its totient is φ = 9303465600.

The previous prime is 20871729469. The next prime is 20871729499. The reversal of 20871729476 is 67492717802.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 797966 + ... + 823706.

It is an arithmetic number, because the mean of its divisors is an integer number (847632576).

Almost surely, 2^20871729476 is an apocalyptic number.

20871729476 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

20871729476 is a deficient number, since it is larger than the sum of its proper divisors (19814634172).

20871729476 is a wasteful number, since it uses less digits than its factorization.

20871729476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26292 (or 26290 counting only the distinct ones).

The product of its (nonzero) digits is 2370816, while the sum is 53.

The spelling of 20871729476 in words is "twenty billion, eight hundred seventy-one million, seven hundred twenty-nine thousand, four hundred seventy-six".