20549734968 has 64 divisors (see below), whose sum is σ = 60145585920. Its totient is φ = 5728147200.

The previous prime is 20549734957. The next prime is 20549734993. The reversal of 20549734968 is 86943794502.

It is a super-2 number, since 2×20549734968² (a number of 21 digits) contains 22 as substring.

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, 1484818 + ... + 1498593.

It is an arithmetic number, because the mean of its divisors is an integer number (939774780).

Almost surely, 2^20549734968 is an apocalyptic number.

20549734968 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20549734968 is an abundant number, since it is smaller than the sum of its proper divisors (39595850952).

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

20549734968 is a wasteful number, since it uses less digits than its factorization.

20549734968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2983468 (or 2983464 counting only the distinct ones).

The product of its (nonzero) digits is 13063680, while the sum is 57.

The spelling of 20549734968 in words is "twenty billion, five hundred forty-nine million, seven hundred thirty-four thousand, nine hundred sixty-eight".