20674675021 has 16 divisors (see below), whose sum is σ = 27759005568. Its totient is φ = 14870894400.

The previous prime is 20674675003. The next prime is 20674675027. The reversal of 20674675021 is 12057647602.

It is a cyclic number.

It is not a de Polignac number, because 20674675021 - 2⁹ = 20674674509 is a prime.

It is a super-3 number, since 3×20674675021³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20674675027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10326010 + ... + 10328011.

It is an arithmetic number, because the mean of its divisors is an integer number (1734937848).

Almost surely, 2^20674675021 is an apocalyptic number.

It is an amenable number.

20674675021 is a deficient number, since it is larger than the sum of its proper divisors (7084330547).

20674675021 is a wasteful number, since it uses less digits than its factorization.

20674675021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20654052.

The product of its (nonzero) digits is 141120, while the sum is 40.

The spelling of 20674675021 in words is "twenty billion, six hundred seventy-four million, six hundred seventy-five thousand, twenty-one".