20245150621 has 32 divisors (see below), whose sum is σ = 22325677920. Its totient is φ = 18279530496.

The previous prime is 20245150619. The next prime is 20245150691. The reversal of 20245150621 is 12605154202.

It can be written as a sum of positive squares in 16 ways, for example, as 3883159225 + 16361991396 = 62315^2 + 127914^2 .

It is not a de Polignac number, because 20245150621 - 2¹ = 20245150619 is a prime.

It is a super-2 number, since 2×20245150621² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20245150621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20245150691) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23733631 + ... + 23734483.

It is an arithmetic number, because the mean of its divisors is an integer number (697677435).

Almost surely, 2^20245150621 is an apocalyptic number.

It is an amenable number.

20245150621 is a deficient number, since it is larger than the sum of its proper divisors (2080527299).

20245150621 is a wasteful number, since it uses less digits than its factorization.

20245150621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1393.

The product of its (nonzero) digits is 4800, while the sum is 28.

The spelling of 20245150621 in words is "twenty billion, two hundred forty-five million, one hundred fifty thousand, six hundred twenty-one".