20712629 has 4 divisors (see below), whose sum is σ = 23671584. Its totient is φ = 17753676.

The previous prime is 20712607. The next prime is 20712631. The reversal of 20712629 is 92621702.

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, and also an emirpimes, since its reverse is a distinct semiprime: 92621702 = 2 ⋅46310851.

It is a cyclic number.

It is not a de Polignac number, because 20712629 - 2¹⁶ = 20647093 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 (20712649) 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, 1479467 + ... + 1479480.

It is an arithmetic number, because the mean of its divisors is an integer number (5917896).

Almost surely, 2^20712629 is an apocalyptic number.

It is an amenable number.

20712629 is a deficient number, since it is larger than the sum of its proper divisors (2958955).

20712629 is an equidigital number, since it uses as much as digits as its factorization.

20712629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2958954.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 20712629 is about 4551.1129408091. The cubic root of 20712629 is about 274.6281652276.

The spelling of 20712629 in words is "twenty million, seven hundred twelve thousand, six hundred twenty-nine".