20003851672 has 16 divisors (see below), whose sum is σ = 42865396560. Its totient is φ = 8573079264.

The previous prime is 20003851657. The next prime is 20003851697. The reversal of 20003851672 is 27615830002.

It is a happy number.

It is a congruent number.

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, 178605763 + ... + 178605874.

It is an arithmetic number, because the mean of its divisors is an integer number (2679087285).

Almost surely, 2^20003851672 is an apocalyptic number.

It is an amenable number.

20003851672 is an abundant number, since it is smaller than the sum of its proper divisors (22861544888).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20003851672 is a wasteful number, since it uses less digits than its factorization.

20003851672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357211650 (or 357211646 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The spelling of 20003851672 in words is "twenty billion, three million, eight hundred fifty-one thousand, six hundred seventy-two".