20648949134 has 32 divisors (see below), whose sum is σ = 34020435456. Its totient is φ = 9321749920.

The previous prime is 20648949109. The next prime is 20648949161. The reversal of 20648949134 is 43194984602.

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, 7666292 + ... + 7668984.

It is an arithmetic number, because the mean of its divisors is an integer number (1063138608).

Almost surely, 2^20648949134 is an apocalyptic number.

20648949134 is a deficient number, since it is larger than the sum of its proper divisors (13371486322).

20648949134 is a wasteful number, since it uses less digits than its factorization.

20648949134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4960.

The product of its (nonzero) digits is 1492992, while the sum is 50.

The spelling of 20648949134 in words is "twenty billion, six hundred forty-eight million, nine hundred forty-nine thousand, one hundred thirty-four".