20349688528 has 40 divisors (see below), whose sum is σ = 42504029568. Its totient is φ = 9382515072.

The previous prime is 20349688519. The next prime is 20349688531. The reversal of 20349688528 is 82588694302.

It is a happy number.

It is a super-2 number, since 2×20349688528² (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 7 ways as a sum of consecutive naturals, for example, 154701 + ... + 254227.

Almost surely, 2^20349688528 is an apocalyptic number.

It is an amenable number.

20349688528 is an abundant number, since it is smaller than the sum of its proper divisors (22154341040).

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

20349688528 is a wasteful number, since it uses less digits than its factorization.

20349688528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100531 (or 100525 counting only the distinct ones).

The product of its (nonzero) digits is 6635520, while the sum is 55.

The spelling of 20349688528 in words is "twenty billion, three hundred forty-nine million, six hundred eighty-eight thousand, five hundred twenty-eight".