20021354650 has 48 divisors (see below), whose sum is σ = 41935673088. Its totient is φ = 7045632000.

The previous prime is 20021354623. The next prime is 20021354653. The reversal of 20021354650 is 5645312002.

It is not an unprimeable number, because it can be changed into a prime (20021354653) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 570087 + ... + 604186.

It is an arithmetic number, because the mean of its divisors is an integer number (873659856).

Almost surely, 2^20021354650 is an apocalyptic number.

20021354650 is an abundant number, since it is smaller than the sum of its proper divisors (21914318438).

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

20021354650 is a wasteful number, since it uses less digits than its factorization.

20021354650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1174327 (or 1174322 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 20021354650 its reverse (5645312002), we get a palindrome (25666666652).

The spelling of 20021354650 in words is "twenty billion, twenty-one million, three hundred fifty-four thousand, six hundred fifty".