20424786498 has 80 divisors (see below), whose sum is σ = 46609200000. Its totient is φ = 6683262048.

The previous prime is 20424786469. The next prime is 20424786553. The reversal of 20424786498 is 89468742402.

20424786498 is a `hidden beast` number, since 2 + 0 + 424 + 78 + 64 + 98 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 10216503 + ... + 10218501.

It is an arithmetic number, because the mean of its divisors is an integer number (582615000).

Almost surely, 2^20424786498 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20424786498, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23304600000).

20424786498 is an abundant number, since it is smaller than the sum of its proper divisors (26184413502).

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

20424786498 is a wasteful number, since it uses less digits than its factorization.

20424786498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3141 (or 3132 counting only the distinct ones).

The product of its (nonzero) digits is 6193152, while the sum is 54.

The spelling of 20424786498 in words is "twenty billion, four hundred twenty-four million, seven hundred eighty-six thousand, four hundred ninety-eight".