20147007461 has 4 divisors (see below), whose sum is σ = 23025151392. Its totient is φ = 17268863532.

The previous prime is 20147007443. The next prime is 20147007467. The reversal of 20147007461 is 16470074102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20147007461 - 2¹⁴ = 20146991077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20147007467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1439071955 + ... + 1439071968.

It is an arithmetic number, because the mean of its divisors is an integer number (5756287848).

Almost surely, 2^20147007461 is an apocalyptic number.

It is an amenable number.

20147007461 is a deficient number, since it is larger than the sum of its proper divisors (2878143931).

20147007461 is an equidigital number, since it uses as much as digits as its factorization.

20147007461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2878143930.

The product of its (nonzero) digits is 9408, while the sum is 32.

The spelling of 20147007461 in words is "twenty billion, one hundred forty-seven million, seven thousand, four hundred sixty-one".