20626654 has 4 divisors (see below), whose sum is σ = 30939984. Its totient is φ = 10313326.

The previous prime is 20626643. The next prime is 20626657. The reversal of 20626654 is 45662602.

It is a semiprime because it is the product of two primes.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20626657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5156662 + ... + 5156665.

It is an arithmetic number, because the mean of its divisors is an integer number (7734996).

Almost surely, 2^20626654 is an apocalyptic number.

20626654 is a deficient number, since it is larger than the sum of its proper divisors (10313330).

20626654 is a wasteful number, since it uses less digits than its factorization.

20626654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10313329.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 20626654 is about 4541.6576269023. The cubic root of 20626654 is about 274.2476582297.

The spelling of 20626654 in words is "twenty million, six hundred twenty-six thousand, six hundred fifty-four".