20648967390 has 32 divisors (see below), whose sum is σ = 55063913760. Its totient is φ = 5506391232.

The previous prime is 20648967373. The next prime is 20648967419. The reversal of 20648967390 is 9376984602.

It is a happy number.

20648967390 is a `hidden beast` number, since 2 + 0 + 6 + 489 + 6 + 73 + 90 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

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, 38238559 + ... + 38239098.

It is an arithmetic number, because the mean of its divisors is an integer number (1720747305).

Almost surely, 2^20648967390 is an apocalyptic number.

20648967390 is an abundant number, since it is smaller than the sum of its proper divisors (34414946370).

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

20648967390 is a wasteful number, since it uses less digits than its factorization.

20648967390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76477673 (or 76477667 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 54.

The spelling of 20648967390 in words is "twenty billion, six hundred forty-eight million, nine hundred sixty-seven thousand, three hundred ninety".