20279899650 has 24 divisors (see below), whose sum is σ = 50294151504. Its totient is φ = 5407973200.

The previous prime is 20279899637. The next prime is 20279899657. The reversal of 20279899650 is 5699897202.

It is a super-2 number, since 2×20279899650² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20279899657) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67599516 + ... + 67599815.

It is an arithmetic number, because the mean of its divisors is an integer number (2095589646).

Almost surely, 2^20279899650 is an apocalyptic number.

20279899650 is an abundant number, since it is smaller than the sum of its proper divisors (30014251854).

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

20279899650 is a wasteful number, since it uses less digits than its factorization.

20279899650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135199346 (or 135199341 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 57.

The spelling of 20279899650 in words is "twenty billion, two hundred seventy-nine million, eight hundred ninety-nine thousand, six hundred fifty".