20687274476 has 12 divisors (see below), whose sum is σ = 39493887720. Its totient is φ = 9403306560.

The previous prime is 20687274469. The next prime is 20687274523. The reversal of 20687274476 is 67447278602.

It is a super-3 number, since 3×20687274476³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 235082621 + ... + 235082708.

It is an arithmetic number, because the mean of its divisors is an integer number (3291157310).

Almost surely, 2^20687274476 is an apocalyptic number.

It is an amenable number.

20687274476 is a deficient number, since it is larger than the sum of its proper divisors (18806613244).

20687274476 is a wasteful number, since it uses less digits than its factorization.

20687274476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470165344 (or 470165342 counting only the distinct ones).

The product of its (nonzero) digits is 6322176, while the sum is 53.

The spelling of 20687274476 in words is "twenty billion, six hundred eighty-seven million, two hundred seventy-four thousand, four hundred seventy-six".