20049984146 has 4 divisors (see below), whose sum is σ = 30074976222. Its totient is φ = 10024992072.

The previous prime is 20049984139. The next prime is 20049984167. The reversal of 20049984146 is 64148994002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64148994002 = 2 ⋅32074497001.

It can be written as a sum of positive squares in only one way, i.e., 19042620025 + 1007364121 = 137995^2 + 31739^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20049984146.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5012496035 + ... + 5012496038.

Almost surely, 2^20049984146 is an apocalyptic number.

20049984146 is a deficient number, since it is larger than the sum of its proper divisors (10024992076).

20049984146 is a wasteful number, since it uses less digits than its factorization.

20049984146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10024992075.

The product of its (nonzero) digits is 497664, while the sum is 47.

The spelling of 20049984146 in words is "twenty billion, forty-nine million, nine hundred eighty-four thousand, one hundred forty-six".