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20011002212 = 225002750553
BaseRepresentation
bin10010101000101111…
…111010100101100100
31220122121020020110002
4102220233322211210
5311440304032322
613105401120432
71305614466215
oct225057724544
956577206402
1020011002212
118539764163
123a65789118
131b6ba5a716
14d7b94b40c
157c1be0c92
hex4a8bfa964

20011002212 has 6 divisors (see below), whose sum is σ = 35019253878. Its totient is φ = 10005501104.

The previous prime is 20011002173. The next prime is 20011002227. The reversal of 20011002212 is 21220011002.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 19727887936 + 283114276 = 140456^2 + 16826^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20011002193 and 20011002202.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2501375273 + ... + 2501375280.

It is an arithmetic number, because the mean of its divisors is an integer number (5836542313).

Almost surely, 220011002212 is an apocalyptic number.

It is an amenable number.

20011002212 is a deficient number, since it is larger than the sum of its proper divisors (15008251666).

20011002212 is a wasteful number, since it uses less digits than its factorization.

20011002212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5002750557 (or 5002750555 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20011002212 its reverse (21220011002), we get a palindrome (41231013214).

It can be divided in two parts, 20011002 and 212, that multiplied together give a palindrome (4242332424).

The spelling of 20011002212 in words is "twenty billion, eleven million, two thousand, two hundred twelve".

Divisors: 1 2 4 5002750553 10005501106 20011002212