20463452646 has 32 divisors (see below), whose sum is σ = 50371577088. Its totient is φ = 5396954400.

The previous prime is 20463452629. The next prime is 20463452683. The reversal of 20463452646 is 64625436402.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 20463452598 and 20463452607.

It is a congruent number.

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, 18738880 + ... + 18739971.

It is an arithmetic number, because the mean of its divisors is an integer number (1574111784).

Almost surely, 2^20463452646 is an apocalyptic number.

20463452646 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20463452646 is an abundant number, since it is smaller than the sum of its proper divisors (29908124442).

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

20463452646 is a wasteful number, since it uses less digits than its factorization.

20463452646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37478876.

The product of its (nonzero) digits is 829440, while the sum is 42.

The spelling of 20463452646 in words is "twenty billion, four hundred sixty-three million, four hundred fifty-two thousand, six hundred forty-six".