20847434126 has 4 divisors (see below), whose sum is σ = 31271151192. Its totient is φ = 10423717062.

The previous prime is 20847434093. The next prime is 20847434141. The reversal of 20847434126 is 62143474802.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5211858530 + ... + 5211858533.

It is an arithmetic number, because the mean of its divisors is an integer number (7817787798).

Almost surely, 2^20847434126 is an apocalyptic number.

20847434126 is a deficient number, since it is larger than the sum of its proper divisors (10423717066).

20847434126 is a wasteful number, since it uses less digits than its factorization.

20847434126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10423717065.

The product of its (nonzero) digits is 258048, while the sum is 41.

The spelling of 20847434126 in words is "twenty billion, eight hundred forty-seven million, four hundred thirty-four thousand, one hundred twenty-six".