20251645546 has 32 divisors (see below), whose sum is σ = 33655889088. Its totient is φ = 9062202240.

The previous prime is 20251645541. The next prime is 20251645549. The reversal of 20251645546 is 64554615202.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20251645499 and 20251645508.

It is not an unprimeable number, because it can be changed into a prime (20251645541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 866956 + ... + 890008.

It is an arithmetic number, because the mean of its divisors is an integer number (1051746534).

Almost surely, 2^20251645546 is an apocalyptic number.

20251645546 is a deficient number, since it is larger than the sum of its proper divisors (13404243542).

20251645546 is a wasteful number, since it uses less digits than its factorization.

20251645546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23686.

The product of its (nonzero) digits is 288000, while the sum is 40.

The spelling of 20251645546 in words is "twenty billion, two hundred fifty-one million, six hundred forty-five thousand, five hundred forty-six".