20630705501 has 4 divisors (see below), whose sum is σ = 23577949152. Its totient is φ = 17683461852.

The previous prime is 20630705383. The next prime is 20630705549. The reversal of 20630705501 is 10550703602.

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 not a de Polignac number, because 20630705501 - 2²² = 20626511197 is a prime.

It is a super-2 number, since 2×20630705501² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20630705551) 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, 1473621815 + ... + 1473621828.

It is an arithmetic number, because the mean of its divisors is an integer number (5894487288).

Almost surely, 2^20630705501 is an apocalyptic number.

It is an amenable number.

20630705501 is a deficient number, since it is larger than the sum of its proper divisors (2947243651).

20630705501 is an equidigital number, since it uses as much as digits as its factorization.

20630705501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2947243650.

The product of its (nonzero) digits is 6300, while the sum is 29.

The spelling of 20630705501 in words is "twenty billion, six hundred thirty million, seven hundred five thousand, five hundred one".