20744784930 has 32 divisors (see below), whose sum is σ = 49798199808. Its totient is φ = 5530752000.

The previous prime is 20744784917. The next prime is 20744784967. The reversal of 20744784930 is 3948744702.

It is a super-2 number, since 2×20744784930² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20744784930.

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, 72015 + ... + 216045.

It is an arithmetic number, because the mean of its divisors is an integer number (1556193744).

Almost surely, 2^20744784930 is an apocalyptic number.

It is a pronic number, being equal to 144030×144031.

20744784930 is an abundant number, since it is smaller than the sum of its proper divisors (29053414878).

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

20744784930 is a wasteful number, since it uses less digits than its factorization.

20744784930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148842.

The product of its (nonzero) digits is 1354752, while the sum is 48.

The spelling of 20744784930 in words is "twenty billion, seven hundred forty-four million, seven hundred eighty-four thousand, nine hundred thirty".