20719902548 has 24 divisors (see below), whose sum is σ = 36425629800. Its totient is φ = 10312655360.

The previous prime is 20719902517. The next prime is 20719902587. The reversal of 20719902548 is 84520991702.

It can be written as a sum of positive squares in 4 ways, for example, as 11121389764 + 9598512784 = 105458^2 + 97972^2 .

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, 1170290 + ... + 1187862.

It is an arithmetic number, because the mean of its divisors is an integer number (1517734575).

Almost surely, 2^20719902548 is an apocalyptic number.

It is an amenable number.

20719902548 is a deficient number, since it is larger than the sum of its proper divisors (15705727252).

20719902548 is a wasteful number, since it uses less digits than its factorization.

20719902548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18907 (or 18905 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 47.

The spelling of 20719902548 in words is "twenty billion, seven hundred nineteen million, nine hundred two thousand, five hundred forty-eight".