20994132846 has 32 divisors (see below), whose sum is σ = 42132102048. Its totient is φ = 6974105600.

The previous prime is 20994132827. The next prime is 20994132869. The reversal of 20994132846 is 64823149902.

It is a super-2 number, since 2×20994132846² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20994132795 and 20994132804.

It is a congruent number.

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, 3069046 + ... + 3075878.

It is an arithmetic number, because the mean of its divisors is an integer number (1316628189).

Almost surely, 2^20994132846 is an apocalyptic number.

20994132846 is an abundant number, since it is smaller than the sum of its proper divisors (21137969202).

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

20994132846 is a wasteful number, since it uses less digits than its factorization.

20994132846 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8516.

The product of its (nonzero) digits is 746496, while the sum is 48.

The spelling of 20994132846 in words is "twenty billion, nine hundred ninety-four million, one hundred thirty-two thousand, eight hundred forty-six".