20412651 has 8 divisors (see below), whose sum is σ = 31105024. Its totient is φ = 11664360.

The previous prime is 20412649. The next prime is 20412671. The reversal of 20412651 is 15621402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20412651 - 2¹ = 20412649 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 972031 = 20412651 / (2 + 0 + 4 + 1 + 2 + 6 + 5 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20412671) 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, 485995 + ... + 486036.

It is an arithmetic number, because the mean of its divisors is an integer number (3888128).

Almost surely, 2^20412651 is an apocalyptic number.

20412651 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20412651 is a deficient number, since it is larger than the sum of its proper divisors (10692373).

20412651 is an equidigital number, since it uses as much as digits as its factorization.

20412651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972041.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 20412651 is about 4518.0361884341. The cubic root of 20412651 is about 273.2959128163.

The spelling of 20412651 in words is "twenty million, four hundred twelve thousand, six hundred fifty-one".