20578866462 has 192 divisors, whose sum is σ = 57596018688. Its totient is φ = 5153544000.

The previous prime is 20578866457. The next prime is 20578866463. The reversal of 20578866462 is 26466887502.

20578866462 is a `hidden beast` number, since 2 + 0 + 578 + 8 + 6 + 6 + 4 + 62 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 20578866399 and 20578866408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20578866463) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 14221023 + ... + 14222469.

It is an arithmetic number, because the mean of its divisors is an integer number (299979264).

Almost surely, 2^20578866462 is an apocalyptic number.

20578866462 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 20578866462, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28798009344).

20578866462 is an abundant number, since it is smaller than the sum of its proper divisors (37017152226).

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

20578866462 is a wasteful number, since it uses less digits than its factorization.

20578866462 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1835 (or 1832 counting only the distinct ones).

The product of its (nonzero) digits is 7741440, while the sum is 54.

The spelling of 20578866462 in words is "twenty billion, five hundred seventy-eight million, eight hundred sixty-six thousand, four hundred sixty-two".