20746831464 has 48 divisors (see below), whose sum is σ = 56262176100. Its totient is φ = 6906645504.

The previous prime is 20746831463. The next prime is 20746831487. The reversal of 20746831464 is 46413864702.

It can be written as a sum of positive squares in 2 ways, for example, as 20675564100 + 71267364 = 143790^2 + 8442^2 .

It is not an unprimeable number, because it can be changed into a prime (20746831463) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 130729 + ... + 242040.

Almost surely, 2^20746831464 is an apocalyptic number.

20746831464 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20746831464 is an abundant number, since it is smaller than the sum of its proper divisors (35515344636).

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

20746831464 is a wasteful number, since it uses less digits than its factorization.

20746831464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373554 (or 373547 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 45.

The spelling of 20746831464 in words is "twenty billion, seven hundred forty-six million, eight hundred thirty-one thousand, four hundred sixty-four".