20671335512 has 16 divisors (see below), whose sum is σ = 38769846000. Its totient is φ = 10332709920.

The previous prime is 20671335511. The next prime is 20671335539. The reversal of 20671335512 is 21553317602.

It is a super-2 number, since 2×20671335512² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20671335511) 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, 339887 + ... + 396062.

It is an arithmetic number, because the mean of its divisors is an integer number (2423115375).

Almost surely, 2^20671335512 is an apocalyptic number.

It is an amenable number.

20671335512 is a deficient number, since it is larger than the sum of its proper divisors (18098510488).

20671335512 is a wasteful number, since it uses less digits than its factorization.

20671335512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739466 (or 739462 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 35.

The spelling of 20671335512 in words is "twenty billion, six hundred seventy-one million, three hundred thirty-five thousand, five hundred twelve".