20972630 has 32 divisors (see below), whose sum is σ = 43965504. Its totient is φ = 7053696.

The previous prime is 20972621. The next prime is 20972639. The reversal of 20972630 is 3627902.

It is an interprime number because it is at equal distance from previous prime (20972621) and next prime (20972639).

It is a junction number, because it is equal to n+sod(n) for n = 20972593 and 20972602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20972639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 884 + ... + 6536.

It is an arithmetic number, because the mean of its divisors is an integer number (1373922).

Almost surely, 2^20972630 is an apocalyptic number.

20972630 is an abundant number, since it is smaller than the sum of its proper divisors (22992874).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20972630 is a wasteful number, since it uses less digits than its factorization.

20972630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5720.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 20972630 is about 4579.5884094534. The cubic root of 20972630 is about 275.7725055998.

The spelling of 20972630 in words is "twenty million, nine hundred seventy-two thousand, six hundred thirty".