20456671472 has 40 divisors (see below), whose sum is σ = 42186085632. Its totient is φ = 9576243200.

The previous prime is 20456671471. The next prime is 20456671507. The reversal of 20456671472 is 27417665402.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20456671471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144929 + ... + 248832.

Almost surely, 2^20456671472 is an apocalyptic number.

It is an amenable number.

20456671472 is an abundant number, since it is smaller than the sum of its proper divisors (21729414160).

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

20456671472 is a wasteful number, since it uses less digits than its factorization.

20456671472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393977 (or 393971 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 44.

The spelling of 20456671472 in words is "twenty billion, four hundred fifty-six million, six hundred seventy-one thousand, four hundred seventy-two".